The most likely cause of a fire that damaged a warehouse in the Philippines is a sky lantern, a small balloon carried aloft by burning fuel attached to its base.

According to the Cebu Daily News, Felix Suico Jr., head of the Bantay Mandaue Disaster Risk Reduction Management Office, said the fire may have been caused by a lighted sky lantern that landed on the warehouse’s roof. The fire was reported at 12:27 a.m. on January 1. The building was used to store electrical supplies.

Several other fires that broke out at around midnight on New Year’s Eve burned 400 homes in Barangays Guizo and Maguikay, Mandaue City. The causes of those fires have not been released.