Police released this surveillance photo of the robber.
Police released this surveillance photo of the robber.Arlington Police Department

A knife-wielding man robbed an Arlington bank Wednesday morning with his face covered by a napkin, police said.

The heist happened at Winchester Savings Bank, Arlington police said in a tweet.

“Suspect Description: Caucasian male, young, armed w/ a knife, wearing a Red Sox Baseball hat, black napkin over his face, black jacket, blue jeans and sneakers,” police tweeted.

Authorities released surveillance images of the suspect, who remains at large. No further information was immediately available.

Travis Andersen can be reached at travis.andersen@globe.com. Follow him on Twitter @TAGlobe.