BAGHDAD (AFP) - Attacks north of Baghdad, including a third suicide blast in as many days, killed at least eight people Tuesday, officials said, amid a spike in violence that has left almost 70 people dead in all. The latest bloodshed, in which over 150 people have been wounded, has raised tensions as Iraq grapples with a political crisis and demonstrators in mostly Sunni areas of the country call for the resignation of the Shiite premier. In Tuesday’s deadliest attack, six people, including three soldiers, were killed in a suicide car bombing in the town of Taji, just north of the capital, security and medical officials said. Fourteen others were wounded in the explosion, which targeted a joint army-police patrol near a prison.