An engineer with a multinational corporation working on the golden quadrilateral project has died at a hospital in Gaya, Bihar, under mysterious circumstances, a source said on Monday.

Amit Kumar, an engineer with Gammon India Private Limited posted at Sherghati in Gaya district, had been partying with his friends and colleagues and was rushed to the hospital when he began vomiting and complained of uneasiness, Additional Collector Ajit Kumar, officiating as district magistrate, said.

As his condition deteriorated, those who had brought him to the hospital left. Kumar later died.

The additional collector said post mortem would be conducted on Monday to ascertain the exact cause of death.

Satyendra Dubey, project manager of the National Highway Authority Of India, also involved in the execution of the prime minister's dream project, was shot dead by unidentified assailants in Gaya on November 27, leading to a public outcry and institution of a Central Bureau of Investigation probe into the incident.