MANILA, Philippines — An explosion rocked an entrance to the Philippine House of Representatives today, killing a driver and injuring at least seven people, including lawmakers, officials said.

Metropolitan Manila police chief Geary Barias said a lawmaker's driver was killed, while ABS-CBN TV network said a number of cars were damaged and at least three lawmakers were injured. The blast hit as the House ended its session shortly after 8 p.m.

"I heard it and I felt the blast although I was on the other side of the building. The ceiling of the canopy near the south wing entrance came down," Rep. Teodoro Casino told The Associated Press.

Police have cordoned off the area in suburban Quezon City and were looking for clues.