ELKTON, Maryland (AP) -- A melee erupted among a crowd of shoppers in the rush for the new Xbox 360 video game console at a Wal-Mart Supercenter in northeast Maryland. It took 10 police officers to restore order.A crowd of about 300 people waited as much as 12 hours for the game, considered a must-have item this holiday season, to go on sale at 12:01 a.m. Tuesday. But an announcement from a store manager that the Xboxes would be sold on a first-come, first-served basis, instead of using a number system devised by customers, triggered the mayhem."That's when all hell broke loose," said Ben DiSabatino IV, a 23-year-old Bear, Delaware, resident, who had been waiting in line since 4 p.m.Some customers were knocked down and trampled, though there were no serious injuries, said Elkton Police Lt. Lawrence Waldridge.Wal-Mart canceled the sale and police ordered everyone to leave.Copyright 2005 The Associated Press. All rights reserved.This material may not be published, broadcast, rewritten, or redistributed.