UPDATE 5-Sri Lanka railway station suicide blast kills 11

(Updates death toll, adds US comment, details)

By Ranga Sirilal

COLOMBO, Feb 3 (Reuters) - A suspected Tamil Tiger suicide bomber blew herself up in a packed railway station in the Sri Lankan capital Colombo on Sunday, killing 11 people and wounding 92, the military said.

The blast, on the eve of ceremonies to mark the troubled Indian Ocean island nation's 60th anniversary of independence from former colonial ruler Britain, came hours after a crude bomb went off in a zoo in the capital, wounding four visitors.

The government pinned both attacks on the Liberation Tigers of Tamil Eelam (LTTE), who are fighting for an independent state in the north and east of the island in a new and increasingly violent chapter of a 25-year civil war.

An official who answered the phone at the Tigers' peace secretariat in the northern rebel stronghold of Kilinochchi said he knew nothing about an attack, and rang off. The insurgents routinely deny involvement in attacks and have in the past denied targeting civilians.

"When I came out of the ticket counter office, I saw a police officer running with blood on his chest," said Ravindra, a ticket counter officer at Fort railway station in central Colombo, Sri Lanka's main railway hub.

"I saw seven people, including a woman, were lying on the platform."

Local television showed footage of bodies lying in pools of blood. One young man's body was torn apart by the blast.