MANILA -- An earthquake that rattled parts of Luzon earlier this week left at least P200 million worth of damage to infrastructure, according to an initial estimate by the public works department on Wednesday.

The Magnitude 6.1 temblor hit Castillejos, Zambales during the afternoon rush hour on Monday, damaging the Clark Airport and flattening a supermarket in neighboring Pampanga province, and causing buildings to sway in the capital.

The initial P200-million cost of damage was from roads and bridges, with the figure expected to climb as assessment teams send their reports, said Public Works Secretary Mark Villar told DZMM.

Some 130 public structures inspected by the government sustained "minor damage" but none posed "immediate danger", he said.

Assessment teams are analyzing "many" theories on why the 4-year-old Chuzon Supermarket in the agriculture town of Porac, Pampanga collapsed when neighboring structures were left intact, he said.

Aftershocks temporarily halted rescue operations at the supermarket rubble where at least 5 people died, with an undetermined number still missing on Wednesday morning.

The damaged Consuelo Bridge in Floridablanca, Pampanga and the Dike Road in nearby Bacolor will open later Wednesday, said Villar.

Less than 24 hours after Monday's quake, a Magnitude 6.5 temblor rocked parts of Visayas, and Bicol and Caraga regions on Tuesday afternoon. Authorities said the 2 earthquakes were unrelated.

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