Duterte's latest remarks on the crisis in Marawi City is a change in stance from last week, when he urged Maute militants to talk with him. "I will not talk to the terrorists," he said in a speech to the military in Davao City on Wednesday.
Outraged by what he believes is insincerity towards a peace process he has started with communist rebels fighting a separate, long-running conflict, Duterte said its exiled leadership would be arrested if they came back to the Philippines.
He has previously invited them to return home and even offered them government posts.
(Reporting by Martin Petty and Neil Jerome Morales; Editing by Paul Tait)