Police are on high alert in New York after an explosion killed at least seven people in the city.
A bomb exploded in a subway car on a crowded subway platform in the heart of Manhattan, New York’s mayor, Bill de Blasio, said on Monday.
There were no immediate reports of casualties.
The blast occurred at around 8:20am (17:20 GMT).
The blast injured five people, said de Blasio.
He said it appeared the device was a homemade bomb, and that authorities were investigating the device.
Authorities are asking anyone who was on the subway or walking the streets to stay away.
The New York Police Department said it had received “multiple credible reports” that a device was in a car at the corner of the Fulton Street and Columbus Avenue station.
“A bomb went off in the subway car at Fulton Street & Columbus Avenue Station in New Manhattan and was found to be homemade,” the NYPD tweeted.
Police said the device exploded near the corner, but did not say if it was a device connected to the New York attack or a homemade device.NYPD Commissioner James O’Neill said there were “multiple witnesses” who saw what happened.
The explosion came as New Yorkers were leaving the New Haven Transit Center station, where about 300 people had gathered to catch a train to Manhattan.
There was no immediate claim of responsibility for the attack.