Four men were injured, one seriously, yesterday when the scaffolding on which they were working collapsed and fell in a town house under construction in an 11-building complex in Fairfax County.

The seriously injured man was Fernando Jiminez, 57, of 7829 Enola St. in McLean, said a spokeswoman for Fairfax County General Hospital, where Jiminez was taken by ambulance. He was listed in serious condition yesterday afternoon with multiple internal injuries, the spokeswoman said.

Three other men received minor injuries in the 11 a.m. accident. They were treated at Fairfax County General and released.

Fairfax County fire officials said Jiminez and the other men were laying brick from a scaffolding on the second floor of a two-story building at Brookside Office Park, 6399 Little River Turnpike, west of the Capital Beltway near Alexandria. The scaffolding gave way and fell through a floor and the front wall of the building, officials said. Three of the men walked away from the cascade of bricks, but Jiminez was buried by the debris, officials said.

"The scaffolding turned loose from the bottom, everything came in and kicked everybody off the top," said Robert Cleveland, a coworker on the scene. "Fernando did a complete flip and landed at the base. He was completely covered up with bricks. By the time I pulled all the stuff off of him, he was bleeding all over and spitting up blood."

Fire officials said there was no indication of any safety violation in yesterday's accident, although the cause of the collapse is still under investigation.