On 22 March 2016, the Islamic State bombed &lt;a href="Maalbeek/Maelbeek%20metro%20station"&gt;Maalbeek/Maelbeek metro station&lt;/a&gt; in a terrorist attack that coincided with another bomb attack at Brussels Airport. The bombing at Maalbeek station killed twenty people. The incident prompted the temporary closure of the entire system, and a major reduction in service for several weeks. A fundamental review of security procedures on the metro is underway as of 2016.