Gunmen have shot dead a town mayor and three other people at the airport in the Philippine capital, Manila, sending travellers fleeing for safety, authorities said. Ukol Talumpa, the mayor of the town of Labangan in Zamboanga del Sur province, was killed together with his wife, an 18-month-old baby and one other person. Four other people were wounded in the incident, according to airport manager Jose Honrado. Al Jazeera's Jamela Alindogan reports from manila.