BNP Secretary General Mirza Fakhrul Islam Alamgir on Sunday alleged that their party Chairperson Khaleda Zia's younger son Arafat Rahman Koko was killed ‘through torture’ by the interim regime of Fakhruddin-Moyeenuddin after the 1/11 political changeover in 2007.

The 51st birthday of late Arafat Rahman Koko, the younger son of BNP founder Ziaur Rahman and ex-prime minister Khaleda Zia, will be observed on Wednesday.