The United States and United Kingdom have expressed deep shock at the attack on Shia Mosque in Bogra which left one person killed.

"Deeply saddened by attack on a Shia mosque while Bangladeshis were at prayer and offer condolences to victim's family," US Ambassador Marcia Bernicat said in a twitter statement today.

In separate statement, British High Commissioner to Bangladesh Robert Gibson condemned the attack.

The British envoy in a statement today said, "I am appalled at the savage attack on worshippers during prayer time in a mosque near Bogra; nothing can justify such attacks on people expressing their faith or beliefs. I extend my deepest condolences to the victims and their families."

"This is latest in a series of violent extremist incidents in Bangladesh. Recent events including in Paris, Mali, and Beirut show that no country is immune from such attacks and reinforce the need for international cooperation to tackle both the immediate threat and the root causes of such extremism." Gibson said.