EPHRATAH, N.Y. - Divers searched a large pond while investigators combed nearby woods Saturday for any sign of the pilot of a volunteer Angel Flight that crashed in upstate New York, killing two passengers.

The plane's passengers were found dead Friday night near where the small plane crashed in Ephratah, about an hour west of Albany, Fulton County Sheriff Thomas Lorey said. The bulk of the plane was found submerged in a pond, he said.

Angel Flight is a nonprofit group that arranges free air transportation for sick patients from volunteer pilots. Larry Camerlin, president and founder of Angel Flight Northeast, said the organization was "tremendously saddened" by news of the crash.

The twin-engine Piper PA 34 had departed from Hanscom Field in Bedford, Mass., and was headed to Rome, N.Y., before it crashed just after 5 p.m., Federal Aviation Administration spokeswoman Kathleen Bergen said.

"We looked up and saw the plane flipping in the air. Then it fell apart. Parts and pieces of it were flying through the sky, and a body fell out," said Granny's Ice Cream Shanty owner Joan Dudley. She said she and her employees were among the first at the scene Friday night, calling 911 as they raced to the site.