The U.S. Embassy in Kyiv issued a security alert Saturday warning that a «potentially significant air attack» could hit the city in the next 24 hours.

The U.S. Mission Ukraine said in a statement, «The U.S. embassy in Kyiv has received information concerning a potentially significant air attack that may occur at any time over the next 24 hours.»

«The embassy, as always, recommends U.S. citizens be prepared to immediately shelter in the event an air alert is announced,» the warning added.

The message follows a warning from Ukrainian President Volodmyr Zelenskyy that Russia was preparing to strike Ukraine with a hypersonic Oreshnik missile.

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This is a developing story. Please check back for updates.

Health and Human Services (HHS) Secretary Robert F. Kennedy Jr. announced the indictment of two Minnesota defendants charged in what officials called the «largest autism fraud bust in American history.»

The U.S. Department of Justice (DOJ) indicted 55-year-old Shamso Ahmed Hassan and 25-year-old Hanaan Mursal Yusuf, slapping them with numerous counts of fraud and related charges for their alleged $46.6 million scheme to defraud Minnesota Medicaid’s Early Intensive Developmental and Behavioral Intervention (EIDBI) Program.

The indictment was part of a wider enforcement action taken by the DOJ’s National Fraud Enforcement Division that swept up 15 alleged fraudsters in indictments for schemes that targeted over $90 million in taxpayer funds.

«Today’s arrests represent the largest autism fraud bust in American history. This was not a paperwork error. It was not a technical violation. This was organized theft that exploited the most vulnerable children in America, deceived families, stole taxpayer dollars meant to help children with autism access legitimate care and support,» Kennedy Jr. said in a Friday news conference.

‘EPICENTER OF FRAUD’: MINNESOTA’S EMPTY STOMACHS, FAKE AUTISM THERAPY AND A SCANDAL THAT COULD TOP $2 BILLION

Hassan was a shareholder in two autism centers, Smart Therapy Center and Star Autism Center, but she did not disclose her ownership to the Minnesota Department of Human Services as required by law, prosecutors said. Yusuf worked at the Smart Therapy Center and helped operate the center, including by submitting the businesses’ claims for Medicaid reimbursement, according to the indictment.

MINNESOTA FRAUD SUSPECT WHO JUMPED FROM BUILDING IS ARRESTED, FBI SAYS

The pair allegedly paid kickbacks to families to incentivize them to send their children to Smart Therapy Center and Star Autism Center so they could bill for autism-related services in their children’s names. They then billed Medicaid for services that were not rendered or were not reimbursable by Medicaid, according to the indictment.

Of the $46.6 million they filed for reimbursement, $21.6 million was paid out, per the indictment. The DOJ is seeking restitution for that money.

Assistant Attorney General for the National Fraud Enforcement Division Colin McDonald addresses the media to announce actions combating fraud in Minnesota at the U.S. Attorney’s Office for the District of Minnesota on May 21, 2026 in Minneapolis, Minnesota. The Department of Justice is bringing charges against 15 people for fraud that targeted seven Medicaid programs and over $90 million in taxpayer dollars. (David Berding/Getty Images)

The pair «diverted hundreds of thousands of dollars of the fraud proceeds» to «their families’ personal use and benefit, including through real property purchases and transferring funds overseas, including to Kenya,» according to the indictment.

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The defendants were each charged with one count of conspiracy to commit healthcare fraud and one count of money laundering. Yusuf was charged with five counts of healthcare fraud, while Hassan was charged with two.

Secretary of Health and Human Services Robert F. Kennedy, Jr. addresses the media to announce actions combating fraud in Minnesota at the U.S. Attorney’s Office for the District of Minnesota on May 21, 2026, in Minneapolis, Minnesota.  (David Berding/Getty Images)

«Every fraudulent autism diagnosis steals time, care, and resources from the children for whom this program was designed and who desperately need this care. Families with autistic children already face enormous challenges navigating therapies, specialists, and support systems. Fraud makes those barriers even steeper,» Kennedy Jr. said in the announcement.

China has deployed over 100 vessels in the waters surrounding Taiwan in the week following President Donald Trump’s Beijing summit with Chinese President Xi Jinping, the secretary general of Taiwan’s National Security Council said Saturday.

«Our ISR/intel shows that the PRC has deployed over 100 vessels around the 1st Island Chain over the past few days, so soon after the Beijing summit,» Secretary General Joseph Wu wrote on X.

«In this part of the world, China is the one & only PROBLEM wrecking the Status Quo & threatening regional peace & stability,» Wu concluded.

Wu posted a graphic appearing to show a high volume of Chinese vessel deployments in the South China Sea, the East China Sea and near Taiwan and The Philippines.

CHINA LAUNCHES LARGEST MILITARY DRILLS OFF TAIWAN IN 8 MONTHS WITH LIVE-FIRE EXERCISES CAUGHT ON CAMERA

Wu alerted the world to the ship deployments a little more than a week after Trump left Beijing and just days after Acting U.S. Navy Secretary Hung Cao told U.S. lawmakers that the U.S. was temporarily pausing weapons shipments to Taiwan.

«Right now we’re doing a pause in order to make sure we have the munitions we need for Epic Fury,» Cao testified during a Tuesday hearing of the Senate Appropriations Defense Subcommittee.

Acting Secretary of the Navy Hung Cao testifies during the Senate Armed Services Committee hearing titled «The Posture of the Department of the Navy in review of the Defense Authorization Request for FY2027 and the Future Years Defense Program,» in the Dirksen building on Tuesday, May 19, 2026. (Tom Williams/CQ-Roll Call, Inc via Getty Images)

U.S. lawmakers approved a $14 billion weapons package to be sold to Taiwan in January, though Trump has yet to sign off on it.

AS CHINA TENSIONS LOOM, US TEMPORARILY PAUSES TAIWAN WEAPONS SALES DUE TO IRAN WAR, ACTING NAVY SECRETARY SAYS

Taiwanese officials say they were not alerted to any potential pauses, according to The Associated Press.

Cao’s pause announcement followed the Trump-Xi summit during which Chinese officials made clear that the Taiwan question is China’s biggest issue in diplomatic relations with the United States.

The USS Chung-Hoon observed a Chinese navy ship sharply crossing its path in the Taiwan Strait on June 3, 2023, forcing the American destroyer to slow to avoid a collision during a freedom of navigation transit alongside Canadian frigate HMCS Montreal. (Andre T. Richard/U.S. Navy)

«President Xi stressed to President Trump that the Taiwan question is the most important issue in China-U.S. relations,» Chinese Foreign Ministry spokesperson Mao Ning said in a statement after the Trump-Xi bilateral meeting.

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«If it is handled properly, the bilateral relationship will enjoy overall stability. Otherwise, the two countries will have clashes and even conflicts, putting the entire relationship in great jeopardy,» Ning concluded.

Fox News Digital contacted the White House, a representative for the Taiwanese government and the Chinese Foreign Ministry for additional comment.