Three people were injured and one person is in custody after a shooting at a PATH train station, sources said.

The gunfire erupted just before 5 a.m. as the train pulled into the Pavonia-Newport Station.

Witnesses said a rider bumped into a woman and the pair argued until the man pulled out a gun and shot her. A man who was with the woman stepped into the fray and suffered a gunshot wound as well before he pulled out a gun and shot back, according to witness accounts.

All three victims were taken to New Jersey Medical Center.

The incident halted train service on the Journal Square-bound line for several hours this morning.

Service has been restored but trains are continuing to bypass the station where the shooting investigation is still underway.