ZAMBOANGA CITY (UPDATE) — Two people, including a town mayor from Basilan, were killed while 2 others were wounded after they were shot by unidentified gunmen in this city Monday morning, police said.

Al-Barka Mayor Darussalam Saguindilan Lajid and driver Barad Nuruddin were taken to a hospital but did not survive, the Philippine National Police said.

Akbar Mayor Alih Awal Sali and a security escort were wounded in the same attack.

Initial investigation by the Zamboanga City Police showed the victims were shot by four perpetrators in Seaside, Barangay Baliwasan after disembarking from a sea craft.

The gunmen immediately fled the area and escaped with a motorized boat, the PNP said.

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Basilan Gov. Jim Salliman Hataman condemned in strongest terms the incident.

He called on the authorities to thoroughly investigate the incident and bring the perpetrators to justice.

Lajid's remains were immediately transported to his hometown.

PNP chief Gen. Dionardo Carlos ordered the Western Mindanao police to pursue the perpetrators.

"Because the pursuit may involve overlapping regional jurisdictions, the APC-WM (Area Police Commander-Western Mindanao) is in a better position to coordinate operations by PNP Regional and National Support Units, as well as with AFP and Coast Guard Units in the area," he said in a statement.

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— with a report from Leizel Lacastesantos