Hundreds of thousands of people have attended the funeral of a leading Bangladeshi activist, Sharif Osman Hadi, who died from gunshot wounds. Hadi was attacked in Dhaka earlier this month and died in a Singapore hospital on Thursday. Police have identified suspects, and the shooter may have fled to India, where former Prime Minister Sheikh Hasina is in exile. This has sparked diplomatic tensions between Bangladesh and India. Security was tight in Dhaka on Saturday during the funeral. Hadi was a critic of both India and Hasina, and his death has triggered violence and protests.