A manhunt is underway after police were shot at in Harrow this morning.
The man fired a single shot at three officers in a marked car on Gladstone Way in the early hours of Thursday.
He fled the scene and police are now trying to trace him. He is described as a black male wearing a grey hooded top and jeans.
The officers were not injured.
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Detectives from the Trident and Area Crime Command are investigating.
Police were originally called to reports of a man seen in possession of a firearm in Byron Road at around 12.30am.
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Officers attended and carried out a search of the area. They arrested a man for possession to supply Class B drugs and took him to a north London police station. No weapon was found.
Anyone with any information is asked to contact the investigation team via 101, or call Crimestoppers, anonymously, on 0800 555 111.
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