The discovery of the bodies of an engineer and his driver four days after they went missing from Singur, where Tata Motors is building a small car plant, sparked fresh tension in the area on Friday.

The bodies were found on February 6 and identified on Friday by the kin of the two men -- Jyoti Prakash Biswas, an engineer working with a chemical company in the area, and his driver Kanchan Das.

Police suspect both men were murdered and their bodies dumped by the roadside near the site of the Tata project.

The car in which they were travelling is yet to be traced, police said.

It is yet to be verified if the engineer, a resident of Durgapur, was in any way attached to the Tata Motors' project, the sources said.

This was the second case of unnatural death in Singur since late last year.

On December 18, the half burnt body of 18-year-old Tapasi Mallik was found in a paddy field at Bajemelia village in Singur. She was a member of the Save Farmland Committee that is opposing the acquisition of farm land for the Tata project.