A protester outside Pidgin restaurant on Vancouver's Downtown Eastside was sprayed with pepper spray, but police say they are getting no help from the demonstrators figuring who did it or why.

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Demonstrators have been outside Pidgin restaurant in recent weeks protesting what they see as the gentrification of the low-income neighbourhood. (Lisa Johnson/CBC )

The demonstrators have been making headlines over the last few weeks for protesting what they see as the gentrification of the low-income neighbourhood.

Vancouver police Const. Brian Montague says the victim and the other protesters have been uncooperative, so a motive for the attack is unclear.

"They wouldn't supply their names, they wouldn't supply a statement as to what happened... so we're left with a point here where we don't have a lot to work with."

Police will be asking local businesses if they have security video that may provide some clues.