President Rodrigo Duterte on Monday called for the withdrawal of U.S. special forces troops from a group of islands in the southern Philippines, saying their presence could complicate offensives against Islamist militants notorious for beheading Westerners.Duterte, who was in the spotlight last week over a televised tirade against the United States and President Barack Obama, said the Americans still in Mindanao were high-value targets for the Islamic State-linked Abu Sayyaf militants as counter-insurgency operations intensify.