Authorities are asking for the public’s help in finding a man who robbed a Standish convenience store at gunpoint this afternoon then fled on a blue bicycle.

Police believe the robber is a man, who entered Tabor’s Variety Store at 705 Ossippee Trail West wearing a gray Patriot’s sweat shirt with the hood up and a white bandana with a dark pattern pulled over his lower face, said a release from the Cumberland County Sheriff’s Office.

The robber pulled a dark handgun and demanded money, fleeing with an undetermined sum.

The robber fled west on a bright blue mountain bike. When a witness tried to follow, the robber pointed the gun at the witness, then pedalled into the woods off Shadow Lawn Drive, the sheriff’s office said.

A Yarmouth police dog responded but was unable to track the suspect, the release said.

The robber is described as 5-foot-4 to 5-foot-6 weighing 140 to 160 pounds, wearing blue jeans and white sneakers.

Anyone with information is asked to call the Cumberland County Sheriff’s Office at 774-1444, ext. 2171.