The Boston Police Department reports detectives arrested a man with "a sizeable kitchen-style knife" just as he was reaching into the cash register of the Pleasant View Market on Savin Hill Avenue at Pleasant Street Thursday afternoon.

Police say the detectives were staking out the area around 4:45 p.m. due to a spate of recent armed robberies at the market, when they spotted Haitham Kheir, 42, of Dorchester, "walking up and down the street, looking into the store as he passed."

They add: "Detectives then observed Kheir enter the store, reach over the counter, manipulate the cash register, and knock over several displays."

The detectives rushed in and, after charging him with armed robbery, determined he was the guy who had also robbed the store around 12:30 p.m. on Jan. 28 and so charged him for that as well.

Police records also show a robbery at Savin Hill Avenue and Pleasant Street around 5:30 p.m. on Tuesday.