Police said four people were injured as a device attached to a suspected bomber exploded prematurely at the New York Port Authority bus terminal in Midtown Manhattan during Monday’s morning rush hour.

The injuries were all non-life threatening and one of the injured was a Port Authority police officer, according to the New York Fire Department.

New York Police Commissioner James O’Neill called the explosion a “terror-related incident”.

The suspect was identified by authorities as Akayed Ullah, 27, who lives in Brooklyn. He was injured as the low-tech device attached to his chest exploded in an underground passageway.

He was believed to act alone, said Mayor Bill De Blasio.

US President Donald Trump was briefed about the explosion this morning, according to the White House.