A school bus and a trolley collided in Southwest Philadelphia Wednesday morning, injuring eight people and diverting traffic in the area, authorities said.

No children were on the school bus, a SEPTA spokeswoman said.

About 7:50 a.m., the school bus pulled out in front of the Route 11 trolley on Woodland Avenue, between 56th and 57th Streets, and the vehicles then collided, SEPTA spokeswoman Heather Redfern said.

Seven people on the trolley, including the operator, and the driver of the school bus were injured, she said. She did not have further information on their injuries.

Trolleys were diverted to Chester Avenue following the crash, with SEPTA running shuttle buses on Woodland Avenue from 49th to 58th Streets. About 9 a.m., the normal Route 11 trolley service resumed, but delays were expected, SEPTA said in a tweet.