Published: Aug 05, 2012 11:43 AM EDT

BETHLEHEM, Pa. (AP) - Garrett Reid, the oldest son of Philadelphia Eagles coach Andy Reid, was found dead Sunday morning in his room at the club's training camp at Lehigh University. He was 29.

The police chief at Lehigh, Edward Shupp, said a 911 call was made at 7:20 a.m., and that Garrett Reid was deceased upon a policeman's arrival at the campus dormitory.

"There were no suspicious activities," said Shupp, who said a cause of death had not been determined.

The Eagles practiced after gathering for a team prayer, but Andy Reid was not present. Assistants Marty Mornhinweg and Juan Castillo ran the team's walkthrough, and will oversee the team until Reid returns.

"This is a tough morning for all of us in the Eagles family," Eagles general manager Howie Roseman said. "Garrett grew up with this team and this makes this news even harder for us to process."

The death comes after years of drug problems involving Reid's sons, Garrett, and younger brother, Britt.

Garrett Reid had rebounded from his troubled past and was assisting the Eagles' strength coaches at camp. He and Britt were arrested on drug charges after two separate traffic accidents in 2007. Garrett Reid was imprisoned off and on through 2009.

"We've been with Andy for a long time. He's always been strong for us; we're going to be strong for him right now," Roseman said. "As a father and a friend, we're all hurting."

Eagles owner Jeffrey Lurie said, "This news is heartbreaking for everyone in the Eagles family. Our hearts go out to Andy, his wife, Tammy, and their children."

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