York Regional Police say they are investigating after a woman told police she was sexually assaulted by an Uber driver in Markham this morning.

The alleged incident is said to have occurred shortly after 3 a.m. near 16th Avenue and Woodbine Avenue.

The circumstances around the alleged assault are not clear and police have not said if charges are pending.

In a statement released by Uber Canada spokesperson Susie Heath, the company says they take every safety incident "very seriously."

"We ... are committed to the safety of everyone who uses Uber. As soon as we became aware of the investigation, we reached out to York Regional Police to offer our assistance," the statement says.

"Our safety response team is working quickly to gather information."