Baghdad: A bridge between the northern Iraqi cities of Kirkuk and Tikrit was blown up by bombs overnight in the latest attack against the country's infrastructure, police said on Wednesday.

No one was hurt as traffic is banned at night on many Iraqi roads as a security precaution, but the police said the attack had cut off villages southwest of Kirkuk, 250 km north of Baghdad.

Insurgents have been targeting major bridges in Baghdad and other areas as part of an apparent new tactic to disrupt life and isolate communities. In April, part of the Sarafiya bridge over the Tigris river in the capital was destroyed.