HUNTINGTON BEACH, Calif.–A man washing windows at a medical office building in Huntington Beach was killed today when the equipment he was using came into contact with a 12,000-volt electrical line, authorities said.

The accident happened at about 6:30 a.m. at Beach Boulevard and Newman Avenue, according to the Huntington Beach Police Department.

The worker, whose age and name were not immediately released, was standing on the ground and washing windows of the three-story building when the accident occurred, Huntington Beach fire Capt. Jeff Lopez said.

“He was using a long extension rod with a brush at the end of it … and he had to step around a tree, it appears,” Lopez told Fox11. “And as he did so, he brought the brush and the extension rod away from the building, and he came in contact with the power lines above him–12,000-volt power lines –and tragically, it killed him.”

The building was partially evacuated briefly as a precaution while firefighters determined that the power line was secure and not posing a hazard, Lopez said.