ACTON, Calif.—A security guard aboard a Metrolink train was stabbed and Los Angeles County Sheriff’s Department deputies took a suspect into custody, authorities said Monday.

The stabbing was reported at 9:57 p.m. Sunday at the Vincent Grade train station in Acton, according to Deputy Tracy Koerner.

The security guard intervened when the suspect was trying to fight with passengers, Koerner said.

The security guard asked the suspect to exit the train and the suspect cut the guard on one finger with a utility knife, he said.

A news videographer at the scene said the wounded victim was taken by ambulance to a hospital.

The guard had his wound stitched and was released, Koerner said.

California Highway Patrol officers detained the suspect at the scene until deputies from the Palmdale Sheriff’s Station arrived, he said.

Metrolink posted on social media that Antelope Valley Line Train 285 to Lancaster was holding due to law enforcement activity and offered riders $50 to use for alternative transportation. It was reported at 10:57 p.m. that the train was moving again.