Mounties in Surrey, B.C., yesterday released a composite sketch of a man accused of sexually assaulting a young girl at knifepoint.

RCMP Sgt. Roger Morrow said the six-year-old girl “has been very strong throughout this whole ordeal.”

The sketch is based on a description from the young victim’s 12-year-old brother, who was threatened with a knife and told not to move while the man assaulted his sister.

Morrow cautioned, “It is not a definitive picture, but rather a tool that our investigators will be using.”

None of the three children said they had seen the suspect prior to the assault, Morrow added.

A man in his late 20s or early 30s approached the youths with a folding knife and forced them into a treed area. There he threatened the two boys before taking the girl to a different area and sexually assaulting her. Police were notified of the attack more than 20 hours after it occurred. The girl’s father plastered posters around the neighbourhood, warning parents to be on the lookout.