Peering through low cloud cover, rescuers are attempting to locate a sightseeing plane that crashed with the pilot and four passengers aboard high on a mountain ridge in Denali National Park and Preserve.

The pilot reported on his satellite phone Saturday that there were some injuries but authorities couldn't get details before the satellite connection dropped.

Lt. Col. Candis Olmstead of the Alaska National Guard said Sunday an Air Guard HC-130 was flying over coordinates that came from the plane's emergency locator transmitter and were offered by the pilot.

Katherine Belcher, a spokeswoman for the park, said low cloud cover remains over the area, called Thunder Mountain which she described as more of a ridge.

The identities of the pilot and passengers have not been released.