This is the only article on the topic
from a real journalistic source that I could find.
Syrian students harassing women, students in Fredericton high school | Akin | Ca
No rape is mentioned and the article is from July 2016.
TL;DR: Yes, there are issues with integrating children and young adults whose formative years were from growing up in a brutal war zone.
ALSO: Don't feed the trolls.