London (CNN) A teenage boy has been arrested in London after an acid attack left a fast-food delivery driver "fighting for his life" and likely to go blind.

London Metropolitan Police said that two delivery drivers were attacked in separate acid attacks on Thursday evening.

In both cases, the drivers were targeted by two males on a scooter as they attempted to steal their victims' mopeds. Police are working to establish whether the same pair carried out both incidents or if they may have been coordinated.

The assaults are the latest in a sharp rise in acid attacks in the British capital. The number of attacks rose to 454 last year, up from 261 in 2015. They are predominantly reported in the city's east.

A corrosive substance "was repeatedly thrown on the victim's face," police said of the first attack. The 32-year-old driver was assaulted in the east London district of Walthamstow at around 6 p.m.

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