President Trump on Sunday warned that left leaning groups will be investigated after the fatal shooting of conservative activist Charlie Kirk, though he offered no details.

“If you look at the problem, the problem is on the left. It’s not on the right, like some people like to share the right, the problem we have is on the left,” Trump told reporters. “And when you look at the agitator, you look at the scum that speaks so badly of our country, the American flag burnings all over the place, that’s the left. That’s not the right.”

When questioned on whom he plans to investigate, he added, “We’ll see. We’ll be announcing.”

The president also suggested that some groups affiliated with the left are already under investigation, without specifying which he was referring to.

“A lot of the people that you would traditionally say are on the left,” he said when asked which groups will be investigated, adding, “they’re already under investigation.“

The president on Saturday told NBC News that he wants to see the country heal, “but we’re dealing with a radical left group of lunatics.”

On Sunday evening, Trump also said he plans to attend Kirk’s funeral in a week.

“A very sad weekend,” he said. “We lost a great person.”

“I’ll be going on early Sunday morning,” Trump said. “We’re going to Arizona, taking some people with us, on Air Force One. Maybe you people are going to be with us, I don’t know, but we’re going to be going… early on Sunday morning.”

Kirk, the founder of Turning Point USA, was shot and killed Wednesday during an event on the campus of Utah Valley University. The alleged gunman, Tyler Robinson, was taken into custody by the FBI late Thursday evening.

Trump blamed the “radical left” for the shooting during an address Thursday about Kirk, who was a close ally and played a critical role in his 2024 campaign.