The windows of the petrol-bombed police car were attacked while an officer was still inside the vehicle.
A police officer was also waiting outside the vehicle. Both officers escaped unhurt.
More top news
Labour is promising to increase nurse training places if they win the General Election, to cut costs and boost supply.
The final of the 'Big 6' energy firms to cut prices - EDF - has announced it is reducing gas tariffs by just 1.3%.
Memorial and Learning Centre to use digital technology to commemorate and educate about the Holocaust