Four women have reported a sexual assault by a taxi driver in the Halifax area in the past three months.

A 22-year-old woman was the latest victim. The incident happened in Dartmouth on Sunday around 4 a.m.

Halifax Regional Police say it’s not clear whether the four recent assaults are related.

There have been a dozen sexual assaults by taxi drivers reported in the past five years. None has yet resulted in a conviction.

Police victims services worker Angela Jeffrey-Haynes said the apparent uptick recently may be the result of more women coming forward.

Halifax police advise passengers to note the numbers on cabs roof lights.

However, victims service caseworker Angela Jeffrey-Haynes says she doesn’t think “prevention lies solely on police” or on the “women preventing their own sexual assault.”

Regional councillor Jennifer Watts says more prevention work needs to be done by taxi companies.

One possibility is making cameras inside taxicabs mandatory. At least three major local cab companies say they support that idea.

Taxi driver Majid Latif said he believes cabs are safe.

With a report from CTV Atlantic’s Sarah Ritchie