NEW YORK (CNN) -- New York Police are hunting for a suspect who popped up from underground and tossed a smoke canister at diners in a crowded restaurant Friday.
“A guy came out of the subway grate over there, jumped out, and threw a smoke bomb at the people here,” said tourist Jim Webb.
Surveillance cameras captured footage of a man coming up through an emergency subway hatch and throwing a smoke canister before retreating underground.
An investigation is ongoing, but authorities are asking for the public’s help in identifying the suspect, who wore an American flag shirt and appeared to be in his mid-thirties.
The incident is raising security concerns about the city’s ability to secure its extensive underground subway system.
“You’re talking thousands of miles, who knows how many grates and escape hatches and doors that lead to the outside. You have the idea that obviously a terrorist could pop out of one of these gates and throw a real bomb and then escape down below so it does raise concerns.” FBI Assistant Director Tom Fuentes said.
Fuentes added that since five and a half million people ride the New York subway each day, the task to add enough security to prevent an incident such as what occurred would be a very difficult task.
According to authorities, no injuries were reported following the incident and there is not believed to be a connection to terrorism at this time.