The California Highway Patrol is working to figure out what caused a crash Monday morning involving a school bus.

The crash happened just before 7:30 on North Half Moon Drive near Eastbourne Way. 

Robert Rodriguez with the CHP says there were students on board the bus, but no one was injured. 

The CHP says a car rear ended the bus, which was at a stop at the time. Three children were on board.

It's not known which school the students were being transported to.