Baghdad - At least two people were killed and 11 injured Wednesday by a bomb that hit a police checkpoint in Fallujah, the once hotbed of Sunni insurgency in west Iraq, according to police.

The bomb struck a police checkpoint in the centre of Fallujah, 45 kilometres west of Baghdad, police sources told the Voices of Iraq news agency.

Fallujah, the biggest city in Anbar province, has been enjoying a decrease in violence in recent years credited to major US-Iraqi offensives against Sunni insurgents and local clans joining efforts to oust groups affiliated with the al-Qaeda terror network from the province.

Last month, the US military has indefinitely delayed a scheduled transfer of security responsibilities in the province to Iraqi troops, citing bad weather. (dpa)