ISLAMABAD , Pakistan ( CNN ) -- Pakistani forces have killed as many as 200 Taliban militants in the past day in the Swat and Shangla areas , the military said Sunday . Pakistan has launched a massive military operation against the Taliban in the Swat Valley . CNN could not verify the account , because journalists are barred from the region . The military blamed the Taliban for injuring civilians as the offensive entered its third week . `` Indiscriminate mortar firing and planting of IEDs [ improvised explosive devices ] in the streets and roads by the miscreants in the populated areas of village Thana , Malakand and Mingora , resulted into civilian casualties , '' the military said in a statement . Watch more on crisis » . The military eased a curfew on the region , allowing civilians to flee the fighting between 6 a.m. and 3 p.m. ( 7 p.m. Saturday and 4 a.m. Sunday EDT ) . The United Nations refugee agency warned Friday of a `` massive displacement '' of civilians as the military wages its campaign with helicopter gunships , tanks and artillery . Watch as CNN 's Ivan Watson tours a refugee camp » . In the last few days , an estimated 150,000 to 200,000 Pakistanis have fled the military operation , according to U.N. High Commissioner for Refugees spokesman Ron Redmond , citing provincial government data . Another 300,000 Pakistanis were on the move or expected to flee the fighting . At least two soldiers were killed Sunday , and another died of wounds he suffered on Friday , the military statement said . Watch why civilians have backed the Taliban to survive » . The military has been releasing regular reports saying it has killed Taliban militants in the region , but it has produced little evidence of the successes it claims . Journalists have not been permitted to observe the offensive and the army has not shown the bodies of the dead militants . It is also not clear what effect the offensive is having on the overall fight against the Taliban in the region , as fears grow that they could threaten the stability of Pakistan , a nuclear-armed power and key U.S. ally .
Pakistanis military says Tens of thousands CNN fighters have been killed in EDT . An unknown number of civilians have also been killed and injured . 200 of civilians have fled as the military campaign intensifies .