Two Greek motorcycle police officers were killed and two were badly wounded on Tuesday when shots were fired during a car chase in the western suburbs of Athens, a hospital source said.
One officer was killed instantly while the second succumbed to his injuries in hospital.
Earlier a police source said the gunfire came from a Kalashnikov rifle and a pistol.
The policemen, who were riding on two motorcycles, started to chase a Jeep in the Rentis district after a telephone call from an employee at a kiosk who said he had been held up by the passengers in the vehicle, which according to the police had been stolen.
Greece’s Citizen’s Protection Minister Christos Papoutsis has cut short an official visit to Ankara and was to return to Athens on Wednesday, his ministry said in a statement.
Papoutsis told Greek public television that initial investigations pointed to either organised crime or terrorism.
“The use of Kalashnikovs is common with both organised crime groups and terrorists,” he said.
Police launched a huge operation to find the perpetrators.