( CNN ) -- At least 40 bodies -- all of them wearing uniforms identifying them as army officers -- have been found in a mass grave inside the headquarters of the Bangladesh Rifles paramilitary in the capital , Dhaka , authorities said Friday . Bangladeshi army soldiers gather near the Bangladesh Rifles headquarters in Dhaka Thursday . The discovery brings to at least 62 the number of army officers who have been found dead after mutinous paramilitary forces took dozens of superiors hostages at the Bangladesh Rifles ( BDR ) headquarters on Wednesday . The Rifles laid down their arms after Prime Minister Sheikh Hasina agreed to grant them amnesty . The bodies were found in a grave behind the mortuary building inside the BDR compound in the Pilkhana area of Dhaka , said Cmdr . Abdul Kalam Azad with the Rapid Action Battalion ( RAB ) , an elite internal security team that is helping with the recovery effort . `` It 's a bad scene , '' Azad said . `` You can only see their legs . We 're carrying away only as many as we can fit in ambulances . Then we 're going to go look for more . '' Earlier , 22 bodies had been recovered from the Buriganga River after the rebelling troops dumped them down a sewer during the standoff , authorities said . The Rifles took their superiors -- all military men -- hostage Wednesday morning after a rebellion they said was spurred by years of their grievances not being addressed . Discontent had been bubbling for years among the ranks of the BDR troops , a 65,000-strong paramilitary outfit primarily responsible for guarding the country 's borders . Watch how the paramilitary revolt spread » . The recruits complained their army superiors dismissed their appeals for more pay , subsidized food and opportunities to participate in U.N. peacekeeping operations . Bangladesh and its South Asian neighbors contribute the most troops to such U.N. operations . And the pay is far greater than the meager salary the jawans -- as the BDR troops are called -- make .
Mass grave found with bodies of at least 40 Bangladesh army officers . Score: 7 Rifles laid down arms Thursday after PM agreed to offer them amnesty .