A man got onto a Prince George’s County school bus while three elementary school pupils were on it and caught a ride into the District  on Wednesday, county police allege.

A bystander called the Prince George’s County Police Department to report the unnamed man had boarded the bus in the 4100 block of Suitland Road in Suitland, Maryland, at 2:05 p.m.

By the time police stopped the bus at 2:09 p.m., the man had gotten off. All of the pupils on board were unharmed.

A preliminary investigation found that the man was possibly related to the driver and was given the ride before the driver returned to Maryland with the kids, the PGPD said.

The man is suspected to have been in a fight with a second man in the 3900 block of Suitland Road shortly before he got on the bus. A gun was found in the area of the altercation.

“PGCPS received information from county police that they were investigating a report of a man who boarded a school bus in the vicinity of Suitland Road in Suitland. We are working with PGPD to investigate this incident and will provide an update as more information becomes available,” Prince George’s County Public Schools told ABC affiliate WJLA-TV.

Police are still looking for the man who boarded the bus.

• Brad Matthews can be reached at bmatthews@washingtontimes.com.