Windows and doors on the buses were put through by yobs on board as they tried to goad watching Leeds fans into confrontation.
Police managed to avoid any actual physical clashes taking place. As the trouble flared a line of police held back a mob of around 200 chanting Leeds fans a short distance down Elland Road while a police helicopter hovered overhead.
There were further disturbances after the game as police tried to force Leeds fasn a safe distance from the ground while Millwall supporters were held inside.
Officers on horseback and others with dogs and armed with truncheons spent around 40 minutes clearing the area around Elland Road. At one point clashes between cops and United yobs trying to stand their ground could be seen breaking out in the local McDonalds car park.
Once order had been restored Millwall fans were let out of the stadium onto a number of double decker buses and driven away under heavy police escort at about 5.55pm.