Baghdad, Dec 22, SPA -- Four Iraqi policemen were killed and six others wounded when gunmen opened fire on a police checkpoint in Baghdad on Thursday, police said. The attack comes after a relative lull in violence in the Iraqi capital in recent days as Iraq sealed off its borders, and shut down vehicular traffic during last week's parliamentary elections, Reuters reported. --SPA 12 44 Local Time 09 44 GMT www.spa.gov.sa/313745