"Police initially detained six of the poachers and asked them to lead us (police) to their hideouts inside the forest... Their associates attacked us and we retaliated when the six were killed in crossfire," a police officer said.
The poachers were arrested from different parts of Koyra area of the forest early in the morning while they caught in the line of fire and died instantly during the shootouts in the afternoon at Mandarbari of the Sundarbans, he said.
The gunfight was reported two weeks after the census was released revealing that the number of the Sundarban's famous Bengal Tiger population was far fewer than it was previously thought, sparking an uproar among environmentalists, who demanded intensified anti-poaching campaigns.
During the previous census in 2004, some 440 tigers were recorded in the Sundarbans, one of the last remaining habitats for the big cats.
Experts, however, questioned the accuracy of the previous census when pugmarks were recorded but the hidden cameras used during the last survey gave a more accurate result.