Officials say Philippine marines have clashed for a second day with militants holding three Red Cross workers hostage, killing at least six combatants and wounding 19 troops. The fighting erupted Monday when the gunmen attempted to break out of a loose cordon set up by government forces to box in dozens of militants and their hostages in a hilly jungle near southern Jolo island's Indanan township, Associated Press reported. A military spokesman and the Jolo governor said fighting resumed Tuesday, leaving three militants and three marines dead and 19 troops wounded.