The attack wounded five other people and caused panic among travelers caught up in the chaos.
Gun crime and political 
violence occur with grim frequency in the Philippines. But the shooting 
Friday at Terminal 3 of Ninoy Aquino International Airport appeared 
particularly brazen.
The dead include Ukol 
Talumpa, the mayor of Labangan, a town in the southern Philippines, and 
his wife, said Jose Angel Honrado, the general manager of Manila 
International Airport Authority. The identities of the two other people 
killed haven't been confirmed, he said.
The Philippine National 
Police is investigating the shooting for which there are believed to be 
two suspects, Honrado said. Police officials didn't immediately respond 
to CNN requests for comment.
Authorities said the 
shooting took place around 11:20 a.m. at the terminal's loading bay, an 
area outside the airport's security screening of passengers.
Honrado said flights 
haven't been disrupted and the airport is operating as normal, except 
for the specific area where the shooting happened.
The people wounded in the attack have been taken to a medical center for treatment, he said.
The official Philippines 
News Agency reported that Talumpa had previously survived an 
assassination attempt in Manila in 2010 and a grenade attack in 2012 in 
Zamboanga del Sur, the province where Labangan is situated on the 
southern island of Mindanao.
The Philippines is plagued by political violence. Some political clans control private armies.
The deadliest outbreak 
of politically motivated violence in recent history took place in 2009 
in Maguindanao province on Mindanao. The wife and sister of a political 
candidate and 30 journalists were among the dozens of victims who were 
shot and buried in a mass grave.
Philippines authorities 
say there were more than 1.2 million registered firearms in the country 
last year and estimate there were another 600,000 unlicensed firearms in
 circulation nationwide.
The Philippines is currently estimated to have a population of about 106 million people.