GILGIT (Agencies) - At least 20 people were killed and several others injured when a massive landslide followed by boulders and rocks slid two villages including Atta Abad of Hunza district of Gilgit-Baltistan into river. At least 10 bodies were retrieved from the debris as rescuers battled with extreme weather to reach any survivors. According to Home Secretary Gilgit-Baltistan Muhammad Usman Younus, Atta Abad village slid into the river. The village had already been declared dangerous some two years ago when it had started sliding down. According to reporters, another village also slid into the river and dozens of people were still missing. The debris of the houses fell down into the Hunza River, blocking its water flow and raising fears that low-lying areas across the river would be inundated. Their debris came sliding down into the Hunza River, completely obstructing the water stream. The District Administration has closed a portion of Shahra-e-Karakoram between Hunza and Swat for all types of vehicles and declared an emergency in Hunza. Director General Disaster Management Authority Gilgit-Baltistan, Usman Younis said the rescue and relief activities were being carried out with the help of local volunteers. Deputy Commissioner Gilgit, Asad Zamin said that obstructed river might trigger flooding. He has directed the people living in low-lying areas to move to safer places. Village Atta Abad had 100 houses located on a hillside in Sarat area of Hunza Tehsil. Many of these houses had cracked as a result of similar landslide three years ago. APP adds: Chief Minister Gilgit-Baltistan, Syed Mehdi Shah, directed the local authorities to launch operation for rescue and relief of the affected people of Hunza. Expressing his deep sorrow and grief over the loss of human lives, the CM said that all out efforts would be made for early rehabilitation of the affected people. According to the official sources, the CM issued the orders for relief and rehabilitation of the affected people of Atta Abad Village of Hunza. Meanwhile, police said that big boulders and rocks which fell on a village at Atta Abad area, some 25km from Ali Abad, killed several people. The teams are engaged in rescue and relief operation, the Deputy Commissioner told this correspondent on Monday. Under the direction of Prime Minister Syed Yousuf Raza Gilani, teams of doctors and rescue workers have been dispatched to Hunza to conduct a massive rescue and relief operation there to save the lives of the people who are still stranded under the rubble. The Prime Minister expressed deep sorrow and grief over the loss of lives due to massive landsliding at Atta Abad village. He directed the authorities concerned to provide medical facilities to the injured.