The incident has been reported to Essex Police, who are investigating the attack.
Mr Ahmed said: "I think the group was from another city - they don't have expensive things like computers and phone so they try to steal.
"Dealing with underage people is especially hard for us because the police told us they could not punish them as they are still minors.
There’s a picture of the miscreants at the news report trying to batter their way into the shop, and if you had an image of cheeky schoolboys in short trousers, catapult sticking out of a back pocket, thanks to the description of ‘minors’ it will soon disabuse you, and might in fact have you humming ' Men of Harlech' instead.
