Toronto police arrested a 31-year-old man Thursday on charges of voyeurism and criminal harassment after he allegedly took upskirt photographs on the TTC subway.

According to police, Ammar Hasan followed a 29-year-old woman at the York Mills TTC station and attempted to take images up the woman’s skirt. The man was confronted by a witness and held until police arrived.

Police say the suspect’s cell phone contained numerous recordings of a similar nature, so they believe there are other victims.

The arrest comes on the heels of another voyeurism arrest earlier this week.

On Monday, 34-year-old Adrian McCabe of Scarborough was arrested by a patrol officer who spotted him allegedly putting a cellphone up a 20-year-old woman’s skirt in the Kennedy Rd and Steeles Ave. area of Toronto.

Again, police believe the incident was not isolated and there may be other victims.

Anyone with information on either of these cases is asked to call 416-808-4204 or Crime Stoppers at 416-222-8477.