About 8 a.m., an EMS Plan 1-- which automatically calls five ambulances -- was called, said Fire Media Affairs spokesman Richard Rosado. It was secured at 8:20 a.m.
Nine passengers were injured when the no. 12 Roosevelt CTA bus was rear-ended by a car while at a stop on South Central Park, said CTA spokesperson Sheila Gregory.
The bus driver was not injured.
The Sun-Times Media Wire contributed to this report.