Two Baltimore City police officers on their way to escort NFL commissioner Roger Goodell were injured in a motorcycle accident Sunday morning, Baltimore City police said.

The two officers were on their way to Martin State Airport in Middle River to pick up and escort Goodell to M&T Bank Stadium, where the Ravens faced off against the Pittsburgh Steelers, said Baltimore City police spokesman Anthony Guglielmi.

Shortly after 11 a.m., the officers were involved in a motorcycle accident near Eastern Boulevard and Wilbur Road in Essex. Goodell had not been picked up yet. Baltimore County police responded to the scene and are investigating the incident.

The cause of the accident is not known, said County spokesman Jim Elliott.

The officers sustained non-life threatening injuries after falling from their motorcycles. They were transferred to Maryland Shock Trauma in Baltimore as a precaution and were expected to be released Sunday evening or Monday morning, Guglielmi said. The officers' names were not released.

The escort had been authorized by city police, Guglielmi said. The National Football League had security concerns given Goodell's rank, the high profile football game, and the anniversary of Sept. 11.