Attacks rattle America:

New York is on high alert after an explosion rocked the Chelsea district of Manhattan injuring 29 people, one seriously.

Thousands of people were milling around one of Manhattan’s most fashionable areas when the blast ripped through the area shortly after 8.30pm local time.

It is understood to have originated from a device placed in a metal container – a skip or a large builder’s toolbox – outside the Associated Blind Housing facility at 135 West 23rd Street.

A second device was found four blocks away on West 27th Street. According to several local news sources it was a pressure cooker attached to a mobile phone by tape with protruding wires.

Meanwhile, in New Jersey earlier in the day:

An explosive pipe-bomb-style device blew up a garbage can in Seaside Park, New Jersey on Saturday morning, just before thousands of people were set to pass by for a U.S. Marine charity road run , according to the Philadelphia Inquirer. No one was injured by the explosion, which occurred at 9:35 a.m. along the route of the Marine Semper Fi 5K, which had been scheduled to start at 9 a.m., but was delayed because of late signups. The run was cancelled on account of the explosion. ABC News reports that authorities believe the runners were the target of the bomb, but there is no suspect or known motive as of Sunday morning.