Heavy rains hit the eastern Pakistan city of Lahore, triggering building collapses that left four people dead and 20 others injured, a rescue service official said Sunday. A young girl and her two brothers were crushed to death when the roof of a room in their home collapsed in a residential area of Lahore on Saturday night, said Ruqia Bano, spokeswoman for the state-run rescue service in the city. The children _ aged between 4 and 10 _ died as they slept while their parents were in another room, Bano said. A man in his 30s died when his home collapsed in another part of Lahore, while 20 people were reported injured by debris falling off buildings and walls that were toppled in separate, rain-related incidents in the city, she said.