WASHINGTON — The White House on Friday announced sweeping new sanctions on Libya’s government and it also temporarily abandoned its embassy in Tripoli, as a final flight carrying American citizens departed from the war-ravaged capital.

The Obama administration announced unilateral sanctions against the regime of Moammar Gadhafi.

White House spokesman Jay Carney said the government was working with international allies at the United Nations on other pressure to ease violence that erupted in recent days.

Carney said President Barack Obama will meet with the United Nations secretary general in Washington on Monday to discuss Libya.

Carney did not describe the sanctions in detail, but U.S. Treasury officials warned American banks and financial institutions that they were required to scrutinize “private banking accounts held by or on behalf of senior foreign political figures” and any transactions involving diverted or illegal funds.

Carney hinted that the sanctions will likely target Gadhafi and his inner leadership circle.

“Targeted actions that affect senior political leadership have been shown to have an effect,” he said.