Police in Bangladesh have arrested three people, including a UK citizen, over the murders of secularist bloggers Avijit Roy and Ananta Bijoy Das.
Both were hacked to death earlier this year. Police say British-Bangladeshi Touhidur Rahman planned the killings.
Mr Rahman, an IT expert, is said to have links with a banned militant outfit, Ansarullah Bangla Team (ABT).
Police say his arrest will provide evidence about a total of four killings of secular bloggers this year.