Islamic State group jihadists demolished a notorious government prison in the historic Syrian city of Palmyra on Saturday, as barrel bombs dropped by regime helicopters killed more than 70 civilians in Aleppo. In neighbouring Iraq, government forces retook an area west of the city of Ramadi, which IS overran earlier in May. The Syrian Observatory for Human Rights said Isil planted explosives that "largely destroyed" the Palmyra jail, which was for decades a symbol of abuses meted out on regime opponents. Opponents of President Bashar al-Assad welcomed on social media the destruction of the long-feared prison at Palmyra, which IS seized 10 days ago after government forces pulled out.