Manila, July 17 -- Airports in the Bicol Region (Legazpi, Naga, Virac, and Masbate) are fully operational and are making the necessary preparations for Tropical Depression Crising, the Civil Aviation Authority of the Philippines (CAAP) said on Thursday.

The announcement was made as the cyclone continues to move north-northwestward over the sea east of Catanduanes, based on the weather bureau's 11 a.m. update.

CAAP reported that two flights (DG 6171/6172) between Clark and Masbate were canceled, affecting 109 passengers.

Meanwhile, CAAP also said that all the 44 commercial airports it operates are on heightened alert.

All area and airport managers in potentially affected regions were asked to activate their respective airport emergency...