Explosives not found at condo blast that killed three people MANILA, June 1 (UPI) -- An explosion that killed three people at a condominium complex in a Manila suburb does not appear to have been caused by a bomb, an official said Saturday. Interior Secretary Mar Roxas said bomb-sniffing dogs have failed to detect any sign of explosives at the Two Serendra building in Taguig City, The Manila Times reported. Angelito San Juan, who lived in a condo on the floor where the explosion occurred, had complained of difficulty in breathing before the explosion, Roxas said. San Juan has been hospitalized in intensive care with burns. He was among five people injured by the explosion, including a 9-year-old girl who was walking past the building. Earlier reports said six people had died. The three dead were not in the building, but riding in a delivery van that was crushed by concrete that fell from the building. The company that owns the condominium said the explosion damaged at least 10 units in one tower of the complex. Serendra board member Nestor San Agustin said the explosion occurred about 8:10 p.m. local time in an unoccupied apartment, the Philippine Daily Inquirer reported. Taguig City Major Lani Cayetano said some residents of the damaged condos were being housed in nearby hotels. Others had chosen to stay with relatives.