Police arrested four teenage boys following a robbery at a Kalihi mini-mart yesterday morning.

Police said one boy, 13, entered the Middle Street store to see who was inside and walked out.

Three others, ages 18, 17 and 15, then walked in, assaulted a female clerk, 55, and fled with money and merchandise, police said.

All were found and arrested, three of them on suspicion of second-degree robbery and all four on suspicion second-degree trespassing. They were released pending further investigation.