Newington police are investigating an armed robbery at the Shell gas station located at 1593 Southeast Road just before 11 p.m. on Thursday.
The victim said a masked man robbed him at knifepoint and ran off.
Police from Newington, New Britain, West Hartford, Farmington and a CT State Police K-9 unit searched the area, but did not find the robber.
The clerk said the man was around 5-feet-10. He was wearing all black clothing, a black mask and gloves and ordered the clerk to give him money, police said.
The clerk opened the cash register and the robber ran off with a large quantity of cash.
He was last seen running east toward the Marriott Hotel.
Police said a vehicle might have been parked, waiting in the hotel lot.
Anyone with any information is asked to call Officer Shannon Gonzalez at (860) 666-8445.
