Updated 10:27 PM ET
NEW YORK New York City police have identified a man they say was shoved to his death in front of a subway train by a woman.
Police said Friday that Sunando Sen was pushed from the platform the night before. The 46-year-old Sen was from India and lived alone in Queens.
Investigators identified him through a smartphone and a prescription pill bottle he was carrying when he was struck by a 7 train. His family in India has been notified.
Police are searching homeless shelters and psychiatric units for the woman believed to have pushed him. Witnesses say she was mumbling before she shoved him without warning.
As police sought on Friday to locate the unidentified woman, Mayor Michael Bloomberg urged residents to keep the second fatal subway shove in the city this month in perspective. The news of the horrific death of Sen came as the mayor touted drops in the city's annual homicide and shooting totals.
"It's a very tragic case, but what we want to focus on today is the overall safety in New York," Bloomberg told reporters following a police academy graduation.
The incident happened around 8 p.m. Thursday on the elevated tracks at the 40th Street Station on Queens Boulevard in Sunnyside, CBS Station WCBS reports.
Police said witnesses saw the woman pacing and mumbling on the platform before taking a seat alone on a wooden bench. Then, as the train approached the station, witnesses said she suddenly shot forward,, directly into the path of an oncoming Number 7 train.
The New York Police Department released surveillance video of the suspect running away from the scene. Police said the woman raced down two flights of stairs after the attack and then disappeared onto the crowded street.
Detectives described her as a heavyset Hispanic woman in her 20s, approximately 5-foot-5, with blonde or brown hair. She was last seen wearing a blue, white and grey ski jacket and grey and red Nike sneakers.
The medical examiner said Friday that an autopsy found that Sen died from head trauma.
Commuters on Friday expressed concern over subway safety.
"It's just a really sad commentary on the world and on human beings, period," said Howard Roth, who takes the subway daily.
He said the deadly push reminded him, "the best thing is what they tell you don't stand near the edge, and keep your eyes open."
The incident marked the second deadly subway push this month. On December 3, police said 58-year-old Ki Suck Han was pushed to his death by 30-year-old Naeem Davis. The two were seen on cell phone video arguing just moments before Han was pushed to his death.
In the most recent incident, witnesses said the victim never encountered his attacker and never saw what was coming.
Anyone with information is asked to call the NYPD's Crime Stoppers Hotline at (800) 577-TIPS. The public can also submit their tips by logging onto Crime Stoppers or texting tips to 274637(CRIMES) then enter TIP577.