The Rouses supermarket on North Carrollton Avenue was robbed Thursday night of more than $8,000, authorities said. The heist was among at least three robberies of grocery stores in the New Orleans area reported the same day.

According to New Orleans police, an armed, masked man entered the Rouses at 400 N. Carrollton about 11 p.m., took the security officer’s holster and led him to the store’s cash room. There, the robber made an employee fill a bag with money and fled the store with $8,584.

Police described the gunman as a “slim-build black male with a dark complexion,” about 6 feet 2 inches tall and 160 pounds. He was said to be wearing a dark hooded jacket and dark pants, with black gloves and a tan mask over his face.

Officer Garry Flot, a New Orleans Police Department spokesman, said detectives were working to determine if the same robber is responsible for “other incidents that have recently occurred in and around the city.”

Two attempted robberies were reported Thursday morning at Wal-Mart stores in Jefferson Parish, but the descriptions of the suspects provided by authorities suggested the incidents might not be related. Still, the Jefferson incidents bore similarities to the Rouses stickup.

A man wearing a black ski mask barged into the Wal-Mart on Lapalco Boulevard in Marrero about 1:45 a.m. Thursday and made his way to the money room, according to the Jefferson Parish Sheriff’s Office. The man — described as a black man of slim build, wearing black clothing and standing about 5 feet 9 inches or 5 feet 10 inches tall — fired several rounds with a shotgun into the money room.

“This effort was unsuccessful, causing the suspect to flee the store,” Col. John Fortunato, a Sheriff’s Office spokesman, said in a news release. “There were no injuries, nor was anything taken.”

A few hours later, after 4 a.m., a gunman also wearing black clothing and a cloth mask over his face forced his way into the Wal-Mart at 5110 Jefferson Highway by firing a gun through a glass door, Fortunato said.

The gunman — described as a black man between 5 fee t 10 inches and 6 feet tall, weighing about 215 pounds — similarly attempted to shoot his way into the money room but was unsuccessful, Fortunato said. He fled the store without injuring anyone or taking anything.