A cyclist has been killed in a collision with a car outside a school in Brisbane’s west.

A police spokesman said Kate Street, Indooroopilly, would likely be closed while the Forensic Crash Unit investigated.

A cyclist has been killed in a traffic accident at Indooroopilly. Credit:Twitter - Seven News Brisbane

The accident was outside the Ambrose Treacy College, with police confirming the cyclist was an adult.

A Queensland Ambulance Service spokeswoman said six crews were on scene to treat the cyclist after the crash was reported about 6.40am.

She said paramedics had been treating the cyclist but the victim would not be taken to hospital.

Police spoke with two witnesses outside the school.

"It was just an accident," one of the witnesses said.