Riot police arrested about 30 students Wednesday yelling "Yankee go home" and demonstrating in front of U.S. Army headquarters to demand expulsion of U.S. forces.

Hundreds of riot police in green fatigues and black visored helmets swiftly detained the students as they marched toward the U.S. 8th Army headquarters in southern Seoul. The students, who tried to stage a peaceful sit-down protest, were forced into police buses.