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MANILA: Multiple gunshots sent Philippine senators into hiding in their offices late Wednesday, as a legislator wanted by the International Criminal Court (ICC) has sought refuge in the building.

There were no casualties and the search for the gunmen was ongoing, Interior Secretary Juanito Victor Remulla told reporters, adding that fugitive Senator Ronald Dela Rosa remained inside the building.

Journalists in the senate said they heard at least five gunshots.

The dramatic scene unfolded as Dela Rosa — ex-president Rodrigo Duterte’s top enforcer during his bloody drug war — holed up in the senate complex to dodge arrest and transfer to the Netherlands over alleged crimes against humanity.