BOISE - Boise police are investigating a crash that critically injured a cyclist Tuesday afternoon.

The crash involving the rider of a motorized bicycle and a car happened at around 4:45 p.m. near the intersection of Emerald and Milwaukee streets.

Boise police said a preliminary investigation indicates both the car and the bicycle were heading eastbound on Emerald when the crash happened.

The male cyclist was taken by ambulance to a Boise hospital. He wasn't wearing a helmet, police said.

Northbound Milwaukee was blocked at Emerald while crews worked to clear the scene. It was back open as of around 8:15 p.m.

No citations had been issued Friday night, and police said the investigation is ongoing.

This is a developing story. Check back for updates.