A Palestinian man has been shot dead after driving a digger into a police car and bus in Jerusalem.Describing the incident as a terrorist attack, Israeli authorities say the Arab construction worker rammed the police car flipping it on a busy carriageway before slamming it into an empty bus. Two police officers were slightly injured. The attack echoes two similar incidents last year where Palestinian workers went on the rampage in bulldozers. A taxi driver said he and police officers opened fire on the digger’s driver. ‘‘I definitely identified there was a threat to the life of the policeman that was near the digger and I shot two or three bullets at the terrorist,’‘ said taxi driver Uzi Mahatabi. The driver of the construction vehicle was later taken to hospital and declared dead on arrival. No group has claimed responsibility for the attack.