(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 wasn'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.

（CNN） -一個二戰時期的炸彈被發現在倫敦的奧林匹克公園在星期一，由英國皇室成員主辦的傷者和病退伍軍人體育競賽閉幕音樂會小時後。

雖然炸彈竟然是惰性的，並提醒後來被丟棄，警方說，這確實需要居民和學校附近的公園，將其轉化為公眾使用的2012年倫敦奧運會後撤離。

該公園也是成事在奧運會閉幕音樂會現場星期天。

英國哈里王子創辦的遊戲。

炸彈被發現在公園的國際廣播中心。這還不清楚它是怎麼發現的。

未爆彈藥的情況並不少見在英國，這不僅是二戰期間的對二戰期間德國的空襲場面，但本質上也是一個巨大的武裝營地，訓練場和彈藥庫。