MANILA: Police said Thursday they detained a person in connection with gunfire the previous night inside the Philippine senate, where a lawmaker wanted by the International Criminal Court took refuge.

The shooting did not result in any casualties and came as the one-time enforcer of ex-president Rodrigo Duterte’s deadly drug crackdown sheltered at the legislature.

It was not immediately clear how many suspects were involved in the shooting, with Philippine authorities saying investigation was ongoing.

“He (suspect) was arrested at the area of the incident, at the second floor of the senate building,” Philippine police spokesman Brig.-General Randulf Tuano told reporters.

Police seized live ammunition from the man, who was being tested for gunshot residue.