A suspect in the assassination of conservative activist Charlie Kirk has been taken into custody, President Donald Trump said Friday, calling it a major breakthrough in a case that gripped the nation for nearly two days.

“With a high degree of certainty, we have him,” Trump said in a live interview on Fox News Channel. He added that a minister working with law enforcement helped turn in the suspect, whose identity has not yet been released.

“Somebody very close to him said, ‘That’s him,’” Trump said.

The FBI and Justice Department declined immediate comment. Authorities in Utah, where Kirk was shot and killed Wednesday on a college campus in what officials described as a targeted political assassination, scheduled a news conference for later Friday morning.

Kirk, 31, co-founded the conservative nonprofit Turning Point USA and was a rising figure in Republican politics. He was killed by a single gunshot, police said.