ALBANY — Police arrested two Watervliet brothers Thursday night after one allegedly threw a dart at an officer and the other jumped on top of a patrol car in Center Square, police said.

The incident unfolded around 9:30 p.m. near the intersection of Lark Street and Hudson Avenue when officers were called to the scene to check on a disturbance, said Officer James Miller, a police spokesman.

Frank and Christopher Colwell began shouting obscenities at police officers who arrived on the scene, Miller said. "You're nothing but worthless (expletive) street cops!" Frank Colwell, 29, allegedly screamed while standing in the middle of the busy intersection.

Frank Colwell then jumped on top of a patrol car, traversing from the trunk to the roof and then to the hood before leaping off and running away, Miller said. Colwell struggled with the officer after he eventually chased him down, Miller said.

While Frank Colwell was being arrested, his younger brother Christopher began shouting obscenities and homosexual slurs at surrounding officers. Christopher Colwell, 27, then threw a steel-tipped dart at an officer, Miller said. The dart missed, and Christopher Colwell was taken into custody after struggling with police. Once placed in the back of the cruiser, Christopher Colwell repeatedly tried to kick out one of the car's windows and kicked at the door as well, Miller said.

The brothers, who live at 201 5th Ave., were both charged with reckless endangerment, disorderly conduct and resisting arrest. They were arraigned in Albany City Court and released on bail.

Police do not believe either Frank or Christopher Colwell was drunk at the time of the incident.

Miller said it's not known what prompted the brothers to scream at police, but added that the incident is unrelated to the nearby struggle between officers and members of Occupy Albany that occurred hours earlier. Around 6 p.m. Thursday, police struggled with protesters as they pried away the group's final tent from Academy Park, a few blocks from Hudson Avenue and Lark Street.