Five people have been injured in a stabbing attack at New York’s Penn Station with authorities confirming a suspect is in custody.

Emergency crews rushed to the station about 7pm, where five people were found injured.

Travellers rolled their suitcases past a roped-off section near Tracks 5 and 6, where medical gloves, used bandages, and traces of blood still marked the floor. AP Photo/Ross D. Franklin

Paramedics found one victim with serious injuries, two with moderate injuries, and the remaining victims with minor injuries, according to a statement from the city’s fire department. All were taken to hospital.

The department added that the suspect was in custody but did not provide further details.

The violence unfolded at one of the busiest transport hubs in the United States. Angelina Katsanis/Getty Images

Authorities have not yet released details about what led to the stabbing or whether the victims were specifically targeted.

By late Sunday evening, travellers continued through the station, passing a cordoned-off area near Tracks 5 and 6, where medical gloves, discarded bandages, and smears of blood were still visible on the floor.

The violence unfolded at one of the busiest transport hubs in the United States less than 24 hours before US President Donald Trump is due to attend Game 3 of the NBA Finals at Madison Square Garden, which sits above Penn Station in the heart of Manhattan.

Trump’s planned visit has already prompted extensive security measures around the arena and surrounding streets, with the Secret Service, New York Police Department, and other agencies expected to maintain a strong presence ahead of the nationally televised game.

Authorities have not said if the stabbings will affect security arrangements for Monday night’s event.

The incident occurred in an area used by hundreds of thousands of commuters and travellers each day.

Penn Station is expected to be especially busy ahead of the first NBA Finals game to be played at Madison Square Garden since 1999.

Amtrak police said they were investigating the stabbing and had taken a suspect into custody.

Authorities have not released the suspect’s identity or provided details about potential charges.

– Reported with Associated Press