Marawi tightens security

ZAMBOANGA CITY: Authorities have tightened security in Marawi City in Lanao del Sur after police forces disarmed a powerful bomb planted on a road where government troops frequently pass.

The bomb—assembled from an 81mm mortar round—was defused following its discovery on Thursday in the village of Gandongan. It was not immediately known whether the improvised explosive was planted by members of the jihadist group Islamic State (IS) Ranao or its other allies.