Search teams in northern Peru have scoured the Amazon jungle for human remains at the site of a plane crash that killed at least 39 people Tuesday.

The workers trudged through some thick swampland Wednesday as they searched for victims of TANS Airlines Flight 204, which crashed near the city of Pucallpa. Fifty-nine people survived.

Seven U.S. citizens, including six members of the same family, were among the survivors, along with three Italians.

Airline officials say the trouble happened while the pilot attempted an emergency landing during a severe storm. The Boeing 737-200 had left Lima for Pucallpa enroute to Iquitos.

Pope Benedict XVI offered his condolences to the victims' relatives.

The accident happened a week after a Colombian airliner crashed in western Venezuela, killing all 160 people on board.

Some information for this report provided by AP, AFP and Reuters.