An 11-year-old student and two parents at Evergreen Elementary School got a scare this morning when a squirrel ran into the building and attacked them, drawing blood in two cases, school officials said. All three victims were treated for bites and scratches at a local hospital, said district spokesman Will Ector, and all are undergoing rabies treatment as a precaution. They also were administered antibiotics, he said. The attack occurred as a classroom of first-graders was preparing to go on a field trip, said Ector. Two parent chaperones were standing in the room when a squirrel ran in and then up the leg of one of the parents, he said. "They were trying to get it off and another parent was trying to assist in getting it off," he said. "In the process, both were bitten. One was nipped on the fingertip and scratched on the arm, and the other parent was bitten on the arm." Finally, the squirrel jumped off the mom, did a loop around the classroom, then ran out the door and jumped on an 11-year-old student walking by. She was bitten on the arm as well.