Former FBI Director James Comey said Wednesday that comments President Donald Trump made after firing him in 2017 made him think “that’s potentially obstruction of justice.”

“I thought, ‘That’s potentially obstruction of justice, and I hope somebody is going to look at that,’” Comey told NBC News’ Lester Holt in an interview clip released Wednesday. He added: “What he appears to be saying is, ‘I got rid of this guy to shut down an investigation that threatened me.'”

The former FBI director was referring to the interview Trump himself gave Holt two days after he fired Comey in May 2017, in which the President said of the firing: “When I decided to just do it, I said to myself, I said you know, this Russia thing with Trump and Russia is a made up story.”

On Tuesday, Comey said Mueller’s decision to punt on the question of whether Trump obstructed justice “really confusing.”