BELFAST (Reuters) - Police and troops have been attacked with petrol bombs after a Protestant parade in Northern Ireland in a second night of violence during the province's summer marching season, a police spokesman says.

The trouble broke out after the return leg of a march by the fiercely pro-British Royal Black Preceptory in the town of Lurgan, 20 miles southwest of Belfast, on Tuesday night.

"Later in the evening a crowd attacked Lurgan police station, throwing bricks, bottles and a number of petrol bombs at the rear of the complex," the spokesman said on Wednesday, adding there were no injuries and only minor damage caused.

Earlier, troops had come under attack with petrol bombs in another part of the town and a car had been hijacked by masked men and set alight near a railway crossing. Again there were no injuries reported.

On Tuesday morning, a train carrying Royal Black Preceptory members from Lurgan to a larger event elsewhere in the province was pelted with petrol bombs as it passed a Catholic estate.

Parades by Protestants during the summer months are a source of sectarian tension in the province. The pro-Irish Catholic minority regard marches which pass near their neighbourhoods as unwelcome displays of triumphalism by the pro-British majority.

The violence in Lurgan was less serious than disturbances in north Belfast on Monday night, when rival factions threw stones and bottles at each other and Catholics fought running battles with riot police and troops.

The Belfast disturbances followed a march by the Orange Order -- the largest Protestant brotherhood -- celebrating William of Orange's victory over deposed Catholic King James II at the Battle of the Boyne on July 12, 1690.