Task: Translation
Input (English): Sources said that the U.S. forces first landed their helicopters around the building, then broke through the office's gate, disarmed the guards, confiscated some documents and certain objects, arrested five suspected terrorists, and then left for an undisclosed location.
Output (Japanese): 情報源の人物は、米国軍はまずヘリコプターをその建物の周りに着陸させ、次にオフィスの門を突破し、警備員の武器を取り上げ、いくつかの文書と特定の物品を押収し、5人のテロリスト容疑者を逮捕し、非公開の場所に向けて去ったと言った。