Asean defence ministers are meeting today to map out a response to possible new threats posed by ISIS as some of its fighters return to Asia to regroup and recruit after its defeat in the Middle East.

Their two-day meeting at a former US air base north of Manila comes as Philippine security forces remained locked in fierce combat with some 30 remaining Muslim militants and their kin in Marawi city.

The latter are holed up in a two-storey structure in the southern Philippine city, which has been wracked by fierce fighting for five months now.