Rep. Mike Rogers (R-Mich.), the chairman of the House Intelligence Committee, said that evidence seems to be pointing to North Korea’s involvement in the hacking attack on Sony Pictures Entertainent.

According to the Hill, Rogers said on Friday that even though the North Korean government has denied responsibility, they praised the action.

“I would argue as a former FBI guy, that when a nation state says that this group who doesn’t know who we are but did this on behalf of the North Korean people … and we appreciate it…As we would say in the FBI, ‘That is a clue.'”

He declined to say what what he has been told in intelligence briefings, but said that public information is pointing toward North Korean responsibility.

He also said that the hack attack on Sony was a”game changer” when it came to cybersecurity, although legislation he has been championing has stalled in the Senate.

North Korea has condemned Sony’s release of the movie “The Interview,” a comedy in which Seth Rogen and James Franco play entertainment journalists recruited to assassinate North Korean leader Kim Jung-un.