A knifeman was arrested on Wednesday night after an armed robbery and an attempt to stab a female police sergeant in Hackney.
The incident occurred during a routine police patrol in Stoke Newington High Street at around 5:40pm.
The lone female police officer spotted what appeared to be a robbery in progress and gave chase. When she caught up with the suspect he swung the knife violently in her direction before running away.
An 18-year-old male was later detained with the aid of members of the public.
Inspector Iain Williams from Hackney police said: “This was a very courageous effort from Sergeant Weeden whose first instinct was to catch the suspect in this street robbery.
“She acted in the best traditions of the Met when she fought off the knife attacks and worked to detain and arrest the 18-year-old man.“
He also thanked bystanders who got involved. He added: “I would also like to pay tribute to the passing members of the public who bravely came to assist the officer.”
The suspect was arrested and taken to an east London police station for questioning on suspicion of GBH and robbery.
Police said a knife and a stolen mobile phone were found in the suspect’s possession. They are appealing for potential witnesses to come forward.The victim of the robbery was shaken but unharmed.