UPDATE: The FDNY has updated the injury count to 4. Police say the pipe bomb was attached to the suspect's body. He was badly injured, but the topic of ISIS has come up in initial questioning. We'll continue to update as details become available.

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The NYPD says a person is in custody after an explosion rocked the subway station located beneath the Port Authority bus terminal in Manhattan. Three major subway lines have been completely evacuated and passengers have been evacuated to the ground level. FDNY says that one person is believed to have been injured in the blast.

The Associate Press is reporting that a device was detonated on a the subway platform near the intersection of 42nd street and 8th Avenue. This is roughly one block away from Times Square.

As with most other recent attacks, social media has been the quickest outlet to report details: