British Prime Minister David Cameron on Tuesday sat down for a late lunch with Senate leaders following an earlier meeting with President Barack Obama at the White House.

Wearing a black suit and blue tie, Cameron visited the Senate floor briefly and then met Majority Leader Harry Reid (D-Nev.) in a rear reception room. Invited along was Minority Leader Mitch McConnell (R-Ky.), Foreign Relations Committee Chairman John Kerry (D-Mass.), Sen. Jeanne Shaheen (D-N.H.) and Sen. Frank Lautenberg (D-N.J.).

Reporters and photographers were only allowed in the room for a moment at the beginning of the lunch, during which Cameron made light conversation with the senators about the chamber's schedule compared with that of the British Parliament.

Cameron has indicated openness for a limited inquiry into the release from prison of convicted terrorist Abdelbaset al-Megrahi who is responsible for the 1988 bombing of Pan Am Flight 103. Scottish officials released the bomber last year upon understanding that he was about to die from cancer. Al-Megrahi has survived, however, amid reports that the oil company BP might have been involved in securing his release.

Sens. Charles Schumer (D-N.Y.) and Kirsten Gillibrand (D-N.Y.) have called for an investigation, and Cameron is scheduled to meet Tuesday night with Gillibrand.

Gillibrand issued a statement ahead of the meeting to compliment Cameron on his openness.
 
“I respect and appreciate the prime minister’s comments. He has pledged that his government will review documents on the matter, and that is a good step," Gillibrand said. "However, I still believe we need a full investigation of al-Megrahi’s release, so we can learn from this mistake and assess what steps can be taken so justice is served and terrorists are held accountable.”