Four Syrian security personnel were killed in an ISIS group attack in the northern city of Raqa, which was recently taken by Damascus from Kurdish forces, state media reported on Monday.For all the latest headlines follow our Google News channel online or via the app.Syria’s interior ministry said in a statement that the “terrorist attack” targeted a checkpoint in the area, adding that one of the assailants was killed.In its spokesperson’s first audio message in two years, ISIS had called on its fighters Saturday to fight Syrian authorities.With AFPRead more:Iraq says Ankara agrees to take back Turkish citizens among ISIS detainees from Syria