Philippine President Rodrigo Duterte on Tuesday ordered the arrest of a lawmaker fiercely critical of his deadly drug war, the second presidential critic from the Senate to be threatened with detention.

Senator Antonio Trillanes, who is holed up in the Senate to avoid arrest, has also in the past accused Duterte of corruption and his son of involvement in drug dealing, drawing a pledge of revenge from the president. Opposition politicians immediately condemned the arrest order as political. They compared it with the arrest of senator and Duterte critic Leila de Lima, who is behind bars on what she says are false drug charges.