United states secret service found suspicious powder in the White House, which was initially identified as cocaine.

　　On the evening of July 2, local time, US Secret Service officials found unknown white powder in the work area of the West Wing of the White House, which led to the short-term closure of the White House. Law enforcement agencies in the United States said that preliminary field tests on the powder found in the White House showed that cocaine was positive. After that, the White House reopened soon and the powder was sent away for further testing.

　　According to Washington Post’s report on July 3rd and 4th, after testing the unknown powder found in the West Wing of the White House, a fireman of the Hazardous Materials Group in Washington, D.C. broadcasted the test results by radio, saying that the identification results showed that the powder was cocaine.

　　美国缉毒局表示，本名为苯甲酰芽子碱甲酯的可卡因，是美国《管制物质法》(The Controlled Substance Act) 中的二类药物，它是一种强烈的兴奋剂，且具有很高强度的成瘾潜力。

　　发现粉末的白宫西翼工作区域与美国总统拜登居住的行政官邸相连。 每日，数百人在西翼出入工作。区域内设有椭圆形办公室、新闻区、总统工作人员办公室等工作场所。

　　特勤局发言人安东尼·古列尔米（Anthony Guglielmi）称，他们正在“调查该物质进入白宫的原因和方式”。他说，华盛顿消防部门十分确定，此物质如不吸食，不会产生致命危险，也不会构成威胁。

　　另据《卫报》7月4日报道，此次并非毒品第一次进入白宫。历史上有许多歌手、演员也私自携带违禁物品进入白宫。

　　据半岛电视台7月4日报道，事件发生期间，拜登 (Joe Biden) 以及家人并不在场。拜登和家人于6月30日前往位于美国马里兰州总统休假地的戴维营度假。同一周末，拜登向全国教师工会发表讲话，并准备烧烤活动以纪念美国独立日。

　　报道称，拜登已于7月4日回到白宫。