The White House is investigating congressional Republicans who are leaking classified information to the media, a senior administration official told The Hill on Thursday.

The official said that President Donald Trump would ask the Attorney General to investigate the leaking of classified information, as well as for any potential violations of federal law.

The Trump administration is also looking into the leak of the names of covert U.S. military personnel.

The investigation could lead to a criminal investigation, the official said.

The White House was alerted to the leaks by Rep. Adam Schiff (D-Calif.), the top Democrat on the House Intelligence Committee, according to the official.

Schiff told reporters on Thursday that he had not been briefed about the issue by the White House, but that he was concerned that the leaks were being made to journalists in a “desperate attempt to discredit” the administration.

Schiff said that the White Street Journal was publishing the names, citing unnamed sources, of covert military personnel in Iraq and Syria, as opposed to the more routine release of the name of those individuals in U.K. or Australian news organizations.

Schiff said that it was “quite strange” that U.N. Ambassador Nikki Haley would have such an issue with a leak of military information to The Washington Post.

Haley told CNN on Wednesday that the leak was “not appropriate.”

The leaks were reported by The Washington Times and the New York Times, both outlets that have been known to share sensitive intelligence with the press.