At least 20 persons were killed and 21 more were wounded when a bus fell into a deep ravine in Diamer, a city in Gilgit-Baltistan province in the wee hours of Friday. According to details, the accident occurred on the Karakoram Highway in Yashukhaldas area of Diamer. The bus was travelling to Hunza from Rawalpindi when it fell into a gorge after the driver lost control. Rescue teams reached the spot and shifted the dead and injured to Chilas Hospital. Rescue sources said the death toll might rise further as the majority of the injured were in critical condition.