About 370 antiwar demonstrators were arrested yesterday after planting themselves on the sidewalk in front of the White House, a protest that stretched out for nearly five hours as police removed them in stages to avoid a backlog at a processing center.

The demonstrators, who had stayed in Washington after Saturday’s antiwar rally and march past the White House, were carted away in Metro buses and police vans. Fingerprinting and booking continued late into the evening at a U.S. Park Police operations facility in Anacostia.