The workers had gone to plug a leakage in the concrete ceiling of the basement of the hotel, which is located in Ajman emirate of the UAE on Monday

One body was recovered by police about 16 hours after the accident which happened early Monday morning. By the time of recovery of the body, the concrete had hardened and had to be drilled out piece by piece.

A report in Gulf News on Tuesday said all the victims were Indian workers of Seidco General Contracting which was building the Laguna Beach Hotel on the Corniche Road in Ajman.

The police had, however, not identified workers nationalities by Monday.

The police were questioning the site engineer, a consultant and two others, reports said.

The engineer reportedly said there was a leakage while the concrete was being poured and he had asked the workers to go down and check.

"Within minutes the whole thing went down," he said. Construction of the hotel was stopped twice earlier and work had been going on intermittently over the past two years, workers said.

Rescue workers could not get the bodies out of the basement of the hotel under construction and had first deployed a crane which failed to lift the concrete.