Police say the man sexually assaulted one of the girls. A short time later police believe the same person sexually assaulted a female Grade 9 student as he was leaving the area.
The man is described as white, in his 40s, with long blond hair and a scruffy blond beard. Police say he was wearing a black leather jacket, jeans, and a black and white toque with a hint of red.
Delta Police have called a news conference and further details are expected.