WORCESTER, Mass. (AP) — The trial of two Fitchburg brothers charged with killing a pair of teenagers in what authorities say was a dispute over a parked car blocking a driveway has started.

Opening statements in the trial of 32-year-old Jose Carrion, and 27-year-old Orville Carrion began Tuesday in Worcester Superior Court.

Prosecutors say a fight involving the brothers in the early morning hours of Sept. 6, 2009 ended with the Carrions pulling a gun and a knife and killing 18-year-old Nelson Geraldino and 17-year-old Pedro Genoa. Genoa's brother, Ronny, suffered non-fatal gunshot wounds.

The teens had been at a party in the same apartment building in which the Carrions lived, and the Carrions' car was blocking Ronny Genoa's vehicle.

Defense attorneys say the Carrions acted in self-defense when they were attacked.