Toronto police say an Uber driver is facing sexual assault charges in relation to two investigations.

Police say 36-year-old Taneem Aziz of Mississauga faces one count each of forcible confinement and extortion, and two counts of sexual assault.

The first alleged incident occurred on Sept. 6, 2018, after a 24-year-old woman entered a black SUV she believed to be the Uber she had ordered.

Police allege the driver did not allow her to leave the vehicle, and instead took her to a secluded spot where he's accused of sexually assaulting her.

The second alleged incident happened on April 8, 2019, when police say a 21-year-old woman entered a black SUV.

They allege the driver would not let her leave the vehicle as he drove away from Toronto: first to a fast-food restaurant parking lot, where she tried to get assistance from a bystander; then to a secluded side street, where he allegedly sexually assaulted her.

Aziz is due to appear in court on May 23.

Police say they believe there may be other victims.

A spokesperson for Uber says the company is "fully co-operating with law enforcement," and the suspect's access to the app has been revoked.