( CNN ) -- A World War II-era bomb was discovered in London 's Olympic Park on Monday , hours after the closing concert of a sporting competition for wounded and ill veterans sponsored by members of Britain 's royal family . Although the bomb turned out to be inert and alerts were later dropped , police say it did require evacuations of residents and schools near the park , which was converted to public use after the 2012 London Olympics . The park was also the scene Sunday of the closing concert of the Invictus Games . Britain 's Prince Harry founded the games . The bomb was found at the international broadcast center in the park . It was n't immediately known how it was discovered . Unexploded ordnance is not uncommon in Great Britain , which was not only the scene of German air raids during World War II , but essentially also an enormous armed encampment , training ground and ammunition depot during World War II . Experts defuse unexploded WWII bomb in central Berlin . Suspected WWII bomb prompts evacuations on Hong Kong Island . CNN 's Lindsay Isaac and Brooke Bowman contributed to this report .
Inert bomb in London 's Olympic Park results in evacuations . Comment: The park hosted the Invictus Games closing concert hours before the bomb was discovered .