BAGHDAD (Reuters/AFP) - Bombs killed five Iraqi policemen and at least two civilians on Thursday, police said, and the vice president blamed insurgents trying to delay this months withdrawal of US troops from towns and cities. A string of attacks has cast doubt on the ability of Iraqi forces to keep the lid on a stubborn insurgency after US combat troops pull back from towns and cities by June 30. The political nature of these attacks is becoming clear. They are an attempt to delay or suspend the withdrawal of US forces from Iraqi urban centres according to the timetable, Vice President Tareq al-Hashimi said in a statement. Police in the once turbulent but recently secure western city of Falluja said a roadside bomb there destroyed a police vehicle and killed all five policemen inside. Hours later, at least two people died and 30 others were wounded when another bomb struck a crowded bus terminal in the south of the capital, a hospital source said. In eastern Baghdad, the US military said nine US soldiers were wounded when two roadside bombs hit their patrol. Prime Minister Nuri al-Maliki, a member of Iraqs Shia majority, urged the world on Thursday to denounce the bloodshed. Meanwhile, at least six people died in a new wave of bomb and gun attacks in Iraq on Thursday, as the families of 62 people killed in a Baghdad market bombing began to bury their loved ones. The White House, meanwhile, insisted that Washington was not reconsidering pulling US troops out of Iraqi cities. Wednesdays attack in a market in the predominantly Shiite slum neighbourhood of Sadr City in northeast Baghdad was one of the deadliest this year, and also left about 150 people wounded, officials said. I heard a boom and saw a ball of fire, said 30-year-old father-of-two Najim Ali, who was shopping in the market when the bomb went off. I saw cars flying in the air because of the force of the explosion, he added, saying he fainted shortly after the attack and awoke to find himself in a nearby hospital. Iraqi security forces came in for criticism over the Sadr City bombing, with local residents throwing rocks and shouting at soldiers who fired rounds into the air in a bid to clear the area after the attack. Explosions like this confirm that the Iraqi security forces are not able to protect the people from violence or war, 20-year-old local resident Saif Mohammed said.