At least seven people were killed in various attacks throughout Iraq on Sunday, with three people killed and seven injured by a female suicide bomber at a hospital west of Iraq's capital Baghdad, DPA reported. A doctor and his wife were among the injured in the suicide attack that took place in Amiriyat al-Fallujah near the city of Fallujah, 50 kilometres west of Baghdad, the Iraqi al-Buratha news agency reported. Earlier in the day, extremists killed four civilians, a policeman and a US soldier in various locations, US military said. The soldier died in northern Baghdad when a bomb exploded by his car on Saturday. Two other soldiers suffered injuries in the attack, the military said. The civilians and the policeman died in attacks in the city of Mosul in the restive province of Diyala and in Madain to the south of Baghdad. One of the dead was a sanitation worker, who died in the Diyala capital of Baquba when a bomb exploded next to him in a rubbish- collection vehicle, Aswat al-Iraq news agency reported. Five people were injured in the attack. In Najaf, 180 kilometres south-west of Baghdad, a blast left two Iraqi and US soldiers wounded, a media adviser for the US forces in Iraq said on Sunday. Three policemen were wounded in an attack by unidentified gunmen in central Touz Khormato district, police told VOI. The gunmen were in a civilian vehicle when they attacked a police checkpoint in al-Askari neighborhood, Touz Khormato, 100 kilometres east of Tikrit city, the capital of Salahaddin province, 175 kilometres north of Baghdad.