The body of an unidentified person was recovered Sunday from the premises of Forward Bloc office in the central part of the city, a police officer said.
The decomposed body was spotted by a sweeper on the backside of the office building, close to the boundary wall, he said.
"As soon as the sweeper raised an alarm, those present at the party office informed the police and the body was taken for post-mortem," the officer said.
Forward Block leader H A Sairani said it was not clear how the body landed close to the boundary wall of Hemanta Basu Bhavan, the party's office at Central Avenue.
"It seems somebody dumped the body on the premises, which is adjacent to the thoroughfare," he added.
The identity of the deceased and cause of death could be ascertained only after post-mortem, the officer said, adding that the body must have been dumped behind the building three to four days ago.