Mystery of the Sri Lanka attacks So-called Islamic State has claimed responsibility for the Easter Sunday suicide bombings in Sri Lanka that killed more than 350 people and has released a propaganda video claiming to show the perpetrators Zahran Hashim (inset): Leader of Sri Lanka’s radical National Thowheeth Jama’ath (NTJ) is seen in IS video (main picture). Hashim was one of two suicide bombers who attacked Colombo’s Shangri-La hotel Mohommed Ibrahim: Police are questioning wealthy Sri Lankan businessman and his son, Ijas Ahmed Ibrahim. Police allege two other sons, Imsath Ahmed Ibrahim (right) and Ilham Ahmed Ibrahim were suicide bombers at Shangri-La and Cinnamon Grand hotels Ismail Ahmed Ibrahim: Family’s youngest son is reportedly a fugitive Apr 11: India’s National Investigation Agency warns Sri Lankan counterparts that Hashim and NTJ are plotting suicide attacks Apr 21: During raid at Ilham Ibrahim’s home near Colombo, his wife Fatima detonates bomb, killing herself, her three children and three police officers St. Sebastian’s Church, Negombo INDIA INDIAN OCEAN SRI LANKA Wanathawilluwa Training camp used by NTJ members Locations of attacks: Batticaloa Negombo Colombo Dehiwala 80km 50 miles Sources: The Australian, Long War Journal Pictures: Associated Press, Facebook © GRAPHIC NEWS