ZAMBOANGA CITY (Updated) -- Officials say a powerful explosion has killed at least one person and wounded nine others at an airport in this southern port city.

Military Col. Santiago Baluyot said the blast went off Thursday evening just outside the passenger arrival gate of the Zamboanga city airport terminal.

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He said investigators were still trying to determine whether the fatality was the one carrying the explosive.

Mayor Celso Lobregat said the governor of Sulu province Sakur Tan was among the wounded.

Sulu lies south of Zamboanga. It is a stronghold of the al-Qaida-linked Abu Sayyaf militant group, which notorious for bombings, kidnappings and beheadings. (AP)