MANILA — Heavily armed members of a faction of the Muslim group Moro National Liberation Front took around 20 people hostage in Zamboanga City in the southern Philippines early Monday, following a clash with government troops that left at least six people dead and 24 wounded, authorities said.

The MNLF faction led by Nur Misuari, a former governor of the Autonomous Region in Muslim Mindanao, is now in a standoff with combined police and military troops in four coastal villages around Zamboanga City.

...