Keene police are investigating a Saturday morning robbery at Savings Bank of Walpole on West Street.

Nobody was injured in the incident, which occurred shortly before 9 a.m., bank President Mark Bodin said outside the 400 West St. branch Saturday morning. Seven employees were inside at the time, and no customers were present, he said.

In a news release Saturday afternoon, Keene police said the robber gave a bank teller a note stating that he had a gun and demanding money.

The suspect — a white man, approximately 5’7” or 5’8” and wearing a gray sweatshirt, dark pants, a blue surgical mask and gloves — then fled onto Avon Street with an undisclosed amount of cash, police said. A subsequent K-9 search of the area did not locate him, according to the release.

Savings Bank of Walpole turned over security camera footage to police, according to Bodin, who also declined to say how much money was stolen.

Keene police Sgt. T.J. Derendal said Saturday evening there is no evidence the suspect actually had a firearm. Police, who were alerted to the robbery when someone called department headquarters, have an image of the man from bank security footage, he said.

The West Street branch remained closed for the rest of Saturday, Savings Bank of Walpole said in a Facebook post, and its Court Street location had extended hours until 2 p.m.

In its Facebook post, the bank thanked staff members for their “calm and measured” response.

Bodin said some employees were nonetheless “shaken” by the incident. The company plans to offer counseling to all staff, including those at other branches, next week, he said.

“It is one of those challenges and fears that people have in this profession,” he said of the robbery.

N.H. State Police also responded to the incident, Keene police said.

Anyone who saw the robbery or has further information is encouraged to call Keene police at 603-357-9813 or email Officer Cristina Ostrowski at costrowski@ci.keene.nh.us.

Caleb Symons can be reached at 352-1234, extension 1420, or csymons@keenesentinel.com. Follow him on Twitter @CalebSymonsKS.