Victim Attacked With Pepper Spray at Manassas-area Bank

Police are looking for a man with dreadlocks who used pepper spray to rob and injure someone at a local bank. 
It happened Monday at noon at the BB&T Bank branch on Sudley Road, Prince William County investigators said. 
The victim told police the suspect approached him from behind as he was leaving the bank after cashing a check. 
The suspect tried to spray pepper spray in the victim's face, but missed. He then knocked the victim down and took his backpack, police said. 
The suspect left the scene on a bicycle. 
The suspect is described as a black man in his twenties with a medium complexion and long, black dreadlocks. 
He is 5'9" and weighs about 200 pounds with a heavy build. He was last seen wearing a black shirt, long black pants and a hat.