CHELSEA, Manhattan Pix 11 reports multiple people were injured during an outdoor explosion in Chelsea Saturday night.

The explosion happened at 135 23rd St. between Sixth and Seventh avenues.

It was not immediately clear how many people were injured or the severity of their injuries.

The FDNY is on the scene with the NYPD.

The explosion comes after a pipe bomb exploded in Seaside Park, New Jersey near the Semper Five 5K Charity Run Route. The device was placed in a garbage can.

Photos posted to social media show people standing in the streets.

People are urged to avoid the area.

The NYPD has stopped all southbound traffic on Seventh Avenue at 34th Street.

The FDNY says there is no impact on subways and trains in and out of Penn Station at this time.

This is a developing story, check back for updated information.