PESHAWAR (AFP) - More than 100,000 people fled Swat Valley Sunday after the government eased a curfew to allow trapped families to escape a military onslaught against the Taliban. Aid agencies say they fear a major humanitarian disaster as security forces pound militant hideouts and key towns in and around the Swat valley, a former ski resort torn apart by a two-year insurgency led by the Islamist hardliners. Up to 500,000 desperate people are already believed to have left their homes in Swat and nearby Lower Dir and Buner districts, the United Nations refugee agency has said, many crowding into hastily-set up camps. My information is that more than 100,000 have already managed to leave Swat during the curfew break today (Sunday), said NWFP Forestry Minister Wajid Ali. Ali said local authorities had asked the military to extend the curfew break - which began at 6:00 am - in Swat and Malakand from 3:00 pm to 6:00 pm as more people tried to flee, but the Army said that was impossible. We would have extended it but we have reports of movement of militants. Therefore we cannot extend it further, said local military spokesman Colonel Mohammad Nadeem, adding: There are thousands of vehicles on the road. With the government unable to provide transport for the panicked diaspora, witnesses said people were grabbing what they could and streaming into cars and trucks or setting off on foot with their meagre belongings. I have just 4,000 rupees (50 dollars) cash and some clothes. I must leave today. It is like a doomsday here in Mingora, said 24-year-old Asifa as she stood at the bus stop clinging to her three children. There is nobody to help me. It is everybody for themselves. I am willing to sit even on the roof of the bus, but there is no place. The government has said it is bracing to cope with half a million people displaced by the fighting. The crisis threatens to be the largest man-made humanitarian disaster in Pakistans post-independence history, the British-based charity Muslim Aid said in a statement on Sunday. NWFP Information Minister Mian Iftikhar Hussain on Saturday appealed to the international community to help Pakistan cope with the flood of refugees. The situation at the camps is very worrisome because the weather is hot and people are facing many difficulties, Hussain told a news conference. Thousands of troops backed by warplanes and helicopter gunships are involved in the massive operation against Taliban and extremist fighters in the area, where jet fighters were pounding suspected rebel hideouts. Local administration chief Khushhal Khan said the government had made no arrangements for the transportation of the fleeing civilians, but had set up five more camps in North West Frontier Province where they will be lodged.