Three people have been arrested after an aggravated robbery at St Marys this morning. Just after 10.30am two people allegedly entered a hair dressers on South Road, one person was armed with a machete. The people threatened staff leaving with the till and a hand bag with an iPhone . The victims were not physically injured. Luckily the iPhone had find my iphone application operating. A quick thinking police officer tracked the phone which led to the arrest of three people. – See more at: http://www.sapolicenews.com.au/more-news/21729-aggravated-robbery-st-marys-three-arrested.html#sthash.HHCQFKzP.dpuf