SEATTLE — Five people were arrested Tuesday after tying themselves to poles erected over the railroad tracks at a BNSF Railway yard in Everett that about a dozen demonstrators blocked to protest train shipments of oil and coal and proposed export terminals in the Northwest.Two women and three men who refused to leave the more than eight-hour protest were taken to the Snohomish County Jail, railroad spokesman Gus Melonas said. He expected they would be charged with trespassing. Three trains were delayed and others were diverted around the blocked tracks, Melonas said, but no railroad property was damaged.Organized by the group Rising Tide Seattle, the protesters set up a tripod of poles over the tracks with a woman perched on top, about 20 feet up, while others locked themselves to the three legs. Railroad police used a motorized lift, also known as a cherry picker, to bring the woman down, Melonas said.Railroad police, who are commissioned officers with authority to issue citations or make arrests for trespassing or other criminal activity on railroad property, arrived after the protest started about 6 a.m. and asked the demonstrators to leave, Melonas said. Eight left peacefully during the noon hour, but five others locked to the tripod refused to move, he said. BNSF police called in a team of officers from the city of Bothell with the skill and equipment to cut cables tied closely to the demonstrators’ bodies.