An old, abandoned building collapsed in General Santos City following the magnitude 7.2 earthquake in Sarangani province Saturday morning.

Initial reports said the building on Santiago Boulevard corner Cagampang Street collapsed after the quake that struck past 4 a.m.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said the quake was felt at Intensity V in the following areas: General Santos City; Koronadal City; Santa Maria, Jose Abad Santos, Don Marcelino, Balot Island, Davao Occidental; Polomolok, Tupi, South Cotabato; Alabel, Malapatan, Glan, Sarangani; Palimbag, Sultan Kudarat.

Intensity IV- Davao City; Cotabato City; Zamboanga City

Intensity III- Cagayan De Oro City

Intensity II- Kidapawan City

Phivolcs chief Renato Solidum told radio DZMM that residents near coastal areas in the region should be wary of possible tsunami waves.

The Pacific Tsunami Warning Center, in an initial advisory, said the quake may trigger tsunami waves as far away as Indonesia.