(Adds third body found) GUWAHATI, India, 23 Nov (Reuters) - Suspected anti-India militants exploded a bomb outside a crowded railway station in the northeastern state of Assam on Thursday, killing three people including a six-year-old girl, police said. The blast took place in a taxi parking lot near a military transit camp outside the train station in Guwahati, the biggest city of northeastern India. While one person was killed instantly another succumbed to his wounds in hospital, police said. The body of a girl, aged about six, was later found at the site and police suspected that she may also have been killed instantly. Five people were wounded. Police said they suspected the United Liberation Front of Asom (ULFA), which has been fighting for the freedom of Assam for more than two decades. The rebel group had warned it would target vital installations and security forces in the tea- and oil-rich state ahead of a "protest day" it has called on Nov. 27 to mark the launch of the first major military operation against the group in 1990. "I saw a dead body lying in blood near the auto stand. There was panic all around and people were running to safety," said Jadav Burman, a witness. Ten people were killed and a dozen wounded in twin blasts in Guwahati on Nov. 5. One was in a crowded market in the heart of the city and the other near an oil installation on its outskirts. Violence has increased in the state since the rebels and the central government called off peace talks in September after New Delhi ended a truce. The ULFA accuses New Delhi of plundering Assam's mineral and forest resources and neglecting local development. The outfit launched its revolt in 1979.