Detectives are appealing for information following two separate acid attacks, one of which has left a man critically ill in hospital.
The 32-year-old had a substance repeatedly thrown in his face by two men who tried to steal his moped in Walthamstow on Thursday at 6pm. He was treated at the scene and taken to an east London hospital.
In a separate attack in Yarmouth Crescent in Tottenham about 30 minutes later, another delivery driver, also 32, had a corrosive substance thrown at him. He was also treated in hospital, but his injuries are not believed to be life-threatening or life-changing.
The Met said it was investigating whether the attacks were linked.
“This attack has left a man fighting for his life and with terrible eye injuries,” Det Ch Insp Gordon Henderson said.
“This was an innocent man going about his work as a delivery driver, who may never see again,” he added.
Police said no arrests have been made.