(Updated at 3:35 p.m.) Medics are performing CPR on a construction worker who fell two stories at a construction site on Columbia Pike.

The worker fell about 20 feet at the Rosenthal development site at the corner of Columbia Pike and S. Glebe Road. He is reported to be unconscious and bleeding from the ears, according to scanner traffic.

A technical rescue team has been dispatched from the scene and is discussing using a crane to extricate the worker from the site.

Police have shut down all southbound lanes of Glebe Road at Columbia Pike due to the emergency response. Arlington County detectives and state occupational safety investigators are en route to the scene.