A 7-Eleven clerk was gunned down in his west Phoenix store by a gunman, who police say, was accompanied by two young children.

Police say robbery does not appear to be the motive.

The killing was captured on videotape by the store's surveillance cameras.

Police Detective Stacie Derge says it appears that the suspect walked into the store at 27th and Glendale avenues early Monday carrying a 2-year-old child and also accompanied by a 4-year-old child, then "shot the clerk and then left."

Derge says the suspect and victim had a conversation, "but no kind of fight or anything like that."

Click here to see a surveillance video at myfoxphoenix.com