At least 50 people were injured in the collapse of the building, which police said was badly constructed. Rescue teams were scouring through the rubble for bodies and survivors. Nearly all the building's tenants escaped unharmed as it started to tilt to one side, and most of the casualties were from the 200 or so homes surrounding the structure, witnesses said. "The death toll may go up as there are dozens, maybe 100, people trapped under the rubble," a police officer on the scene said. No other details were immediately available.