Second teen charged with WA armed robbery

A second teenager has been charged over an armed robbery in Perth's southern suburbs.

Police say that just after 7pm (WST) on April 26, the pair entered the Gosnells Mini-Mart on Dorothy Street with their faces covered.

One of the teens allegedly pointed a firearm at the 32-year-old proprietor, who was standing behind the counter, and demanded money from the till.

A 17-year-old Cannington boy was charged with aggravated armed robbery on Wednesday, and is due to appear in the Perth Childrens Court on Thursday.

His alleged accomplice, a 17-year-old Canning Vale boy, was charged on May 6 with aggravated armed robbery and going armed in public to cause fear, and appeared in court the following day.