York Regional Police say 2-year-old Harrison and 4-year-old Keegan Larocque were in the company of their grandfather, 70-year-old Leo Easton.
They were last seen around 3pm on Wednesday at the Upper Canada Mall in Newmarket.
However, police say the trio have been found, safe and sound.
“As a direct result of the Amber Alert Mr. Easton and his two grandchildren were located by the Toronto Police Service driving on Lakeshore Blvd in Toronto. They are all in good health. We thank everyone for their assistance.”