The two missing teenage girls from Oakville, Ont. have been spotted again, this time in downtown Toronto with different hair colours.

Abigail Bergman, 14, and Polinah Ouskova, 15, were reported missing by their families after they didn't come home on Monday night. Since, they've been spotted at Toronto's Union Station and other parts of the Toronto area.

Ouskova and Bergman had blond hair when they left home. (Halton Regional Police Service) Investigators confirmed that on Friday, the pair was spotted in Toronto's King Street West and Strachan Avenue area. Police also released a store's security camera images of the two girls, which shows both have dyed their hair dark.

Police said they believe the girls, who have disappeared separately in the past, likely planned to leave their homes together.

Both police and the teens' families say they're concerned about the girls' safety.

Anyone with information on the teens' whereabouts are asked to call Halton Regional Police at 905-825-4747, ext. 2210 or contact Crime Stoppers by phone at 1-800-222-8477(TIPS), online at the Crime Stoppers website,or by texting "Tip201" with your message to 274637 (CRIMES).