Sunando Sen

The NYPD are asking the public for help identifying a deranged woman who shoved a man into the path of an oncoming train Thursday.

Witnesses say the overweight Hispanic woman sat on a bench mumbling to herself and pacing the platform just moments before she crept up behind Sunando Sen and shoved him to his death under the wheels of the 7-train.

Sen, 46, a hard working native of Calcutta, India, apparently wasn’t aware that the woman was behind him. Witnesses say there was no altercation before the woman pushed Sen onto the tracks.

Witnesses say Sen looked stunned but did not scream as he struggled to get up. His mangled body was found under the 2nd car of the 7-train. Friends say Sen worked 7-days-a-week to support his family.

A surveillance camera at a business located near the 40th street station caught the fleeing suspect.

The suspect is described as a heavy set Hispanic woman, 20-25 years old, wearing jeans, NIKE sneakers and a ski jacket.

“We’re reasonably confident that we’ll identify the suspect. We are properly deployed in transit areas,” Police Commissioner Ray Kelly told the NY Post Thursday.

Sen’s tragic murder was the 2nd such incident to occur in the NY transit system in less than a month.

On Dec. 3, police arrested Naeem Davis, 30, and charged him with murder after he allegedly shoved Queens dad Ki Suk Han, 58, into the path of a Q train at the 49th Street station in Manhattan.

Mayor Bloomberg assured NYC residents that the NY transit system is safe. He dismissed suggestions that surveillance cameras would have prevented similar incidents.

“It’s the safest big transit system in the world,” said Bloomberg. “5.5 million people use it everyday. Cameras wouldn’t prevent what happened yesterday.”