At least 42 labourers were injured after a building inside the Indian Air Force base in Jamnagar district of Gujarat collapsed on Thursday, district officials said here.
Rescue teams have evacuated at least 42 people from the debris, while searches were on for those feared trapped, Jamnagar District Resident Deputy Collector (RDC) Ketan Thakker said. All the injured were labourers, he said.
The condition of three rescued persons is critical, all the injured were admitted to a hospital.
"As of now, focus of the administration is to rescue those still trapped beneath the debris. The cause of building collapse is not yet known," he said.
Fire brigade personnel and medical teams were stationed at the collapse site to assist in the rescue operation, he added.