Avijit Roy was a Bangladeshi-American engineer, online activist, writer, and blogger known for creating and administrating the Mukto-Mona, an Internet blogging community for Bangladeshi freethinkers, rationalists, skeptics, atheists, and humanists. Roy was an advocate of free expression in Bangladesh and coordinated international protests against government censorship and imprisonment of atheist bloggers. He was killed by machete-wielding assailants in Dhaka, Bangladesh, on 26 February 2015; the Islamic militant organization Ansarullah Bangla Team claimed responsibility for the attack.