Due to the presence of volcanic ash clouds on major traffic airways, the Civil Aviation Authority of the Philippines (CAAP) temporarily suspended flights to/from the Ninoy Aquino International Airport (NAIA) on Sunday night.

In an advisory, CAAP spokesperson Eric Apolonio said a Notice to Airmen (NOTAM) was issued suspending departing flights from NAIA from 6:22 p.m. to 11 p.m., and arriving flights from 7 p.m. to 11 p.m.

Authorities are currently discussing the possible redirection of all NAIA arriving flights to Clark International Airport in Pampanga.

Low-cost carriers Cebu Pacific (CEB) and AirAsia Philippines have advised passengers to reach out to them regarding concerns and updates on their flight schedules.

CEB announced that its ground staff will assist affected passengers.

Philippine Airlines, on the other hand, diverted three international flights to Clark, and canceled the rest of its flights supposedly scheduled from 7 p.m. to 11 p.m.

At 7:30 p.m., the Philippine Institute of Volcanology and Seismology (Phivolcs) raised Alert Level 4 on Taal Volcano, a few hours after authorities declared the Volcano under Alert Level 2 and Level 3 in the afternoon.

Authorities have observed a fast escalation in the volcanic activity.

Alert Level 4 means a hazardous explosive eruption is possible within hours to days. (PNA)