The seven Trappist monks of Tibhirine that were abducted on March 27 are killed under uncertain circumstances.

The Trappists, officially known as the Order of Cistercians of the Strict Observance and originally named the Order of Reformed Cistercians of Our Lady of La Trappe, are a Catholic religious order of cloistered monastics that branched off from the Cistercians. They follow the Rule of Saint Benedict and have communities of both monks and nuns that are known as Trappists and Trappistines, respectively. They are named after La Trappe Abbey, the monastery from which the movement and religious order originated. The movement began with the reforms that Abbot Armand Jean le Bouthillier de Rancé introduced in 1664, later leading to the creation of Trappist congregations, and eventually the formal constitution as a separate religious order in 1892.

The Abbey of Our Lady of Atlas is a Catholic monastery of Trappists, inaugurated on March 7, 1938, in Tibhirine, close to Médéa, in Algeria.

On the night of 26–27 March 1996, seven monks of the Trappist order from the Our Lady of the Atlas Abbey of Tibhirine near Médéa, Algeria, were kidnapped during the Algerian Civil War. They were held for two months, and found dead in late May 1996. The circumstances of their kidnapping and death remain controversial; the Armed Islamic Group claimed responsibility for both, but in 2009, retired General François Buchwalter reported that the monks were killed by the Algerian army.

May 21 is the 141st day of the year in the Gregorian calendar; 224 days remain until the end of the year.