WASHINGTON (AP) — The U.S. military has conducted coordinated airstrikes against Islamic State operatives in Somalia, the first attacks in the African nation during President Donald Trump’s second term.

Defense Secretary Pete Hegseth said Saturday that the strikes by U.S. Africa Command were directed by Trump and coordinated with Somalia’s government.

An initial assessment by the Pentagon indicated that “multiple” operatives were killed. The Pentagon said it assessed that no civilians were harmed in the strikes.

Trump, in a post on social media, said a senior IS planner and recruits were targeted in the operation.

“The strikes destroyed the caves they live in, and killed many terrorists without, in any way, harming civilians. Our Military has targeted this ISIS Attack Planner for years, but Biden and his cronies wouldn’t act quickly enough to get the job done. I did!” Trump said. “The message to ISIS and all others who would attack Americans is that “WE WILL FIND YOU, AND WE WILL KILL YOU!”

Trump did not identify the IS planner or say whether that person was killed in the strike. White House officials did not immediately respond to requests for comment.

The Pentagon’s counterterrorism strategy in Africa has been strained as two key partners, Chad and Niger, ousted U.S. forces last year and took over key bases that the U.S. military had used to train and conduct missions against terrorist groups across the Sahel, the vast arid expanse south of the Sahara Desert.

U.S. military officials have warned that IS cells have received increasing direction from the group’s leadership that relocated to northern Somalia. That has included how to kidnap Westerners for ransom, how to learn better military tactics, how to hide from drones and how to build their own small quadcopters.

A U.S. military airstrike in Somalia last May targeted IS militants and killed three, according to U.S. Africa Command.

The number of IS militants in the country are estimated to be in the hundreds, mostly scattered in the Cal Miskaat mountains in Puntland’s Bari region, according to the International Crisis Group.

Saturday’s operation followed military airstrikes on Jan. 30 in northwest Syria, killing a senior operative in Hurras al-Din, an al-Qaeda affiliate, U.S. Central Command said.