Nepal ? Searchers on Monday found the wreckage of a helicopter that disappeared over the weekend while carrying 24 people on a flight chartered by the World Wildlife Fund. No one survived, officials said.

Among those killed in the crash in the mountains 250 miles east of Katmandu were Americans Margaret Alexander, a USAID deputy director in Nepal, and Matthew Preece, a WWF program officer, according to a statement on the conservation group’s Web site.

The helicopter was also carrying Nepalese Forestry Minister Gopal Rai, Finnish Embassy Charge d’Affaires Pauli Mustonen and Canadian Jennifer Headley, a coordinator for WWF.

Several Nepali journalists, government officials and four crew members were also on board.