Six beings have been injured in Stratford, east London, in a reported acid strike.
Police were called to Stratford Centre, opposite Westfield, just before 20:00 BST, following an “altercation” between two groups of males where a poisonous element was thrown.
Ambulance crews plowed six males at the background for their gashes, and three of them were taken to hospital.
A 15 -year-old boy has been arrested on mistrust of grievous bodily harm.
Those reported injured were believed to be in a number of different locations, precipitating initial fears that parties had been sprayed at random.
However the Met Police said those injured were connected to the initial attack.
Ch Supt Ade Adelekan said: “I would like to be very clear concerning this incident.
“What first may have been view as a number of random criticizes has, on closer inspection, been found to be one incident committing two groups of males.”
No-one sustained life-threatening or life-changing injuries.
Witnesses at the place said an arguing had are broken down among a group of people.
A man who held his identify as Hossen, an assistant director at Burger King, said a casualty had run into the fast food chain to “wash acid off his face”.
The 28 -year-old supplemented: “There were slashes around his eyes and he attempted to chuck water into them.”
Tahseen Taj lives in one of the buildings precisely opposite the shopping centre and was disturbed by the noise.
“I could examine a great deal of ambulances and police from around 20:45, but also there’s a West Ham match today; I thought it must be a football brawl, ” she said.
“But after some time it merely increased and increased, and there were a good deal of fire company and ambulances and police, and it was quite tumultuous to be honest.
“I was quite worried.”