Metro Manila (CNN Philippines, April 22) — The number of casualties in the magnitude 6.1 earthquake that jolted parts of Luzon Monday afternoon has risen to eight.

In an interview on CNN Philippines' Newsroom, Pampanga Governor Lilia Pineda said at least eight people in the province were killed in the quake. This is higher than the three casualties earlier reported.

Pineda earlier said the three fatalities were all from Porac, Pampanga. They include an old woman and a child who were killed when walls collapsed on them. The other fatality is a child who died while inside a supermarket that was damaged.

The Philippine Institute of Volcanology and Seismology (PHILVOCS) adjusted the magnitude of the quake upward from the initial 5.7.

The agency said the center of the tectonic quake was in Castillejos, Zambales.

No casulaties and cracks on roads in the town were reported, according to Castillejos Mayor Jose Angelo Dominguez.

Intensity 5 was felt in San Felipe in Zambales; Malolos and Obando, Bulacan; Quezon City; Lipa, Batangas; City of Manila; Abucay, Bataan; Valenzuela City; and Magalang, Pampanga.

Pasig City; Makati City: Caloocan City; Meycauyan and San Jose del Monte in Bulacan; Floridablanca, Pampanga; Villasis, Pangasinan; Tagytay City;Baguio City; Marikina City; Las Pinas City felt Intensity 4.

Meanwhile, Intensity 3 was experienced in Dasmarinas, Indang, and Gen. Trias in Cavite; Lucban, Quezon; Muntinlupa City; Cabanatuan City; Palayan City; Gapan City; as well as Santo Domingo and Talavera in Nueva Ecija.

At least 52 aftershocks have been recorded.

Impact

The quake caused power outage and damages in some structures, including the Clark International Aiport, prompting the cancellation of operations, flights and even classes.

LIST: Flight cancellations after Luzon quake

LIST: Class, work suspensions for April 23

Rescue operations are ongoing in a four-story supermarket in Porac, Pampanga where an unknown number of individuals are trapped. At least 20 were injured and brought to the hospital from the collapsed supermarket.

The National Grid Corporation of the Philippines said the quake caused power interruptions in some provinces such as Pangasinan, Pampanga, La Union and Bataan. Power in Quezon, Batangas, Camarines Sur and Sorsogon were also affected, but were immediately restored.

It also damaged several structures, including the boundary arch separating Bataan and Pampanga, St. Augustine Parish Church in Lubao, Pampanga and Santa Catalina de Alexandria church in Porac, Pampanga.

Due to the earthquake, the Manila Metro Rail Transit System (MRT-3) and Light Rail Transit held off their operations.

Clark International Airport, meanwhile, cancelled flights for at least 24 hours as some parts of the terminal were damaged. Pictures from the airport showed portions of its ceiling fell, with metal bars dangling.

Here are some photos and videos of events after the quake.