He died later after having been kept alive on a life support machine.
Police believe the attack was carried out by three people.
Two shots were fired at the attorney, one hitting him in the back of the head, she said. Two hours after the shooting, a car bomb exploded on the same street, the Interior Ministry said. The blast caused unspecified damage but no injuries, a ministry official said. So far this year the group has claimed responsibility for killing 12 people and is blamed for one more. Earlier on Monday, an army officer found a bomb, believed to have been planted by ETA, in his car.