Rescue work continues in search of six laborers after they were trapped underground in a tunnel collapse on Tuesday at a subway line construction site in Beijing, March 29, 2007.

Rescue work continues in search of six laborers after they were trapped underground in a tunnel collapse on Tuesday at a subway line construction site in Beijing, March 29, 2007.

Rescue work continues in search of six laborers after they were trapped underground in a tunnel collapse on Tuesday at a subway line construction site in Beijing, March 29, 2007.

Rescue work continues in search of six laborers after they were trapped underground in a tunnel collapse on Tuesday at a subway line construction site in Beijing, March 29, 2007.

Editor: Yan