Cairo - Egypt's interior ministry accused Muslim Brotherhood leaders in Qatar of training and financing the perpetrators of the bomb attack on a Cairo church that killed 25 people. The attack was the deadliest attack in recent memory on the Christian minority, who make up about 10 percent of Egypt's population. The interior ministry, in a statement broadcast on state TV Monday evening, said it has identified members of the "terrorist cell'' involved in the bombing, and traced their leadership to a branch of Egypt's Muslim Brotherhood group, which the state designates as a terrorist organisation, residing in Qatar. According to preliminary investigation, the attack was organized by 30-year-old Mohab Qassem, who traveled to Qatar in 2015 where he was offered financial and logistical support by fugitive leaders of the Muslin Brotherhood, who have been residing in the country since 2013, the Ministry's statement said as cited by the Al Wahda newspaper. Qassem then returned to Egypt and was trained to use various types of weapons and design explosive devices.