DANVERS, Mass. (AP) – One of two U.S. Army reservists who died in a traffic wreck in northwestern Panama was Brad A. Svoboda of Danvers, his family said Sunday.

Svoboda, 29, and Christopher Conn, of California, were traveling in a Humvee on Thursday when it was struck by a truck near the town of Miramar, about 300 miles west of Panama City, the U.S. Embassy said.

One of the reservists was declared dead at the scene and another died hours later while being transported by helicopter to the capital, said Roberto Velasquez, director of the National Civil Protection System.

Svoboda’s mother, Mary, said her son had just arrived in Panama on Feb. 12 and was scheduled to stay for a few months.

His reserve unit was participating in a humanitarian aid project. Panama once was home to extensive U.S. military bases until the Americans withdrew from the Canal Zone in 1999, when the canal was ceded to Panama.

In the western province of Bocas del Toro, reserve units are building schools and health clinics, and providing medical assistance for local residents.

“My brother traveled all over the world doing humanitarian work with the Army reserve,” said sister Kelly Svoboda. “He was extremely bright and he was courageous.”

Two other reservists suffered less severe injuries in the crash, the embassy said. A Panamanian traveling in the Humvee was also injured, as well as the driver of the truck.