On 18 April, the GIA's communiqué no. 43 announced that they would release the monks in exchange for Abdelhak Layada, a former GIA leader who had been arrested three years earlier. On 30 April, a tape with the voices of the kidnapped monks, recorded on 20 April, was delivered to the French Embassy in Algiers. On 23 May, the GIA's communiqué no. 44 reported that they had executed the monks on 21 May. The Algerian government announced that their heads had been discovered on May 31; the whereabouts of their bodies is unknown. The funeral Mass for the monks was celebrated in the Catholic Cathedral of Notre-Dame d'Afrique (Our Lady of Africa) in Algiers on Sunday, 2 June 1996. Their remains were buried in the cemetery of the monastery at Tibhirine two days later.