Blogger hacked to death in Bangladesh, fourth this year

Attackers armed with machetes killed a blogger in Bangladesh on Friday, the fourth such killing of an online critic of religious extremism in six months, prompting calls by human rights groups for a swift and thorough investigation.

Militants have targeted secularist writers in Bangladesh in recent years, while the government has tried to crack down on hardline Islamist groups seeking to make the majority-Muslim South Asian nation of 160 million people a sharia-based state.