The United Nations says funding problems may force it to ground the helicopters that are delivering relief to Pakistani earthquake survivors in remote mountainous regions.
U.N. agencies say they have only received one quarter of the money countries pledged for earthquake aid. They say the funding shortfall is delaying their work to help survivors before the Himalayan winter.
But U.S. military officials promised Tuesday they will continue flying their helicopter missions to help survivors.
Hours later, the U.S. military says a rocket-propelled grenade was fired at a helicopter delivering aid. It says the helicopter was not hit and no one was injured. Pakistani officials say there was no attack and that the helicopter crew heard dynamite being used to clear mudslides triggered by the quake.
The October 8 earthquake killed more than 58,000 people, most of them in Pakistani-controlled Kashmir.
Some information for this report provided by AFP, AP and Reuters.