A bipartisan group of senators are triggering an investigation into the disappearance of Washington Post columnist Jamal Khashoggi — who went missing after entering the Saudi consulate in Turkey last week.

Foreign Relations Committee Chairman Bob Corker and top Democrat Bob Menendez sent a letter to President Trump that requires him to determine whether a foreign person is responsible for the killing or torture of Khashoggi.

The letter states that Khashoggi “could be a victim of a gross violation of internationally recognized human rights.”

The Saudi-born journalist vanished Oct. 2 after he went to the consulate in Istanbul to get paperwork so he could marry a Turkish citizen.

“Our expectations is that in making your determination you will consider any relevant information, including with respect to the highest ranking officials in the Government of Saudi Arabia,” the letter reads.

The letter also requires the president to consider possible sanctions on any foreign persons involved in Khashoggi’s disappearance. Kentucky Republican Sen. Rand Paul went a step further, calling on the US to block arms sales to Saudi Arabia if they’re found to have been involved.

But in an interview on Fox News Wednesday night Trump said he was reluctant to cut off arms sales to the Middle Eastern country.

“I think that would be hurting us,” he said. “Frankly I think that would be a very tough pill for our country to swallow. I’d have to find out, really, before I discuss this I’d have to find out what happened — and we are looking.”

The White House has 120 to days submit a report to the committee and results could trigger sanctions on the Saudi regime.

In addition to Corker and Menendez, the letter was singed by Patrick Leahy (D-Vt.), Lindsey Graham (R-S.C.), Marco Rubio (R-Fla.), Jeff Flake (R-Ariz.) and others.