US-Bangladesh blogger Avijit Roy hacked to death

A US-Bangladeshi blogger whose writings on religion angered Islamist hardliners has been murdered in the Bangladeshi capital Dhaka.

Avijit Roy, an atheist who advocated secularism, was attacked as he walked back from a book fair with his wife, who was also hurt in the attack.

Akbar Hossain reports from the scene, where crowds have gathered to lay flowers.