In a brazen midday heist on Sunday, four would-be robbers, wearing masks and armed with guns, entered a Sprint Store in the city’s Chestnut Hill section and barricaded themselves inside, authorities said.

Police arrived at the store, located on the 7700 block of Crittenden Street, at about 1 p.m. in response to a report of a robbery. Once inside, officers apprehended three masked men and two weapons. A fourth suspect fled the scene in a dark gray or black Nissan and remained at large Sunday night.

No injuries have been reported.