WASHINGTON (Reuters) — Al Qaeda leader Ayman al-Zawahiri has been killed in a CIA drone strike in Afghanistan, U.S. officials told Reuters on Monday, the biggest blow to the militant group since its founder Osama bin Laden was killed in 2011.

One of the officials, speaking on the condition of anonymity, said a drone strike was carried out by the CIA in the Afghan capital Kabul on Sunday.

In a statement, Taliban spokesman Zabihullah Mujahid confirmed that a strike took place and strongly condemned it, calling it a violation of “international principles.”

Joe Biden will deliver remarks on Monday at 7:30 p.m. (2330 GMT) on what the White House described as a “successful counter-terrorism operation.”

(Reporting by Idrees Ali. Editing by Leslie Adler and Grant McCool.)

SOURCE: The Washington Free Beacon