At least four people were killed and about 50 injured on Sunday in clashes with police in Bangladesh over a Facebook post that offended Muslims, officials said. The clashes in the southern district of Bhola, 195 km (120 miles) from the capital Dhaka, broke out when angry crowds protested against a Facebook post in which a Hindu reportedly made derogatory remarks about Prophet Mohammad. Police said the Facebook had actually been hacked and all the hackers had been detained.