Three people were seriously injured when the suspect’s car collided with motorbikes and cars on the A100 motorway at about 19:00 (17:00 GMT) on Tuesday evening.
Witnesses reports that the 30-yr-old Iraqi suspect claimed to have a “suspicious object” in a box of ammunition.
Police and prosecutors confirms the series of crashes in three separate places on the A100 near the centre of Berlin were being considered as “deliberate attacks on other road users”. Berlin prosecutor’s office spokesman Martin Steltner told reporters the man was suspected of “in effect hunting down motorcyclists”.
The attack is being investigated as having either a political or religious motive but prosecutors have not ruled out psychological issues.
“Because of the circumstances we don’t see this as a random accident,” Mr Steltner said. “Latest indications point to an Islamist-motivated attack.”