Nottingham riots: More officers to deter disorder
Nottinghamshire Police have said retired officers have come forward to help the force prevent disorder after two nights of disturbances in the city.
A total of 91 people have been arrested for acts of arson and criminal violence after trouble on Monday and Tuesday.
Three people have been charged in connection with the disturbances so far.
Police said they had not asked shops to close early but some city centre stores remained boarded up.
Total UK said it closed its petrol stations in the city at 17:00 BST.
A man, 20, from Sneinton has been charged with section 44 of the serious crime act.
A 16-year-old boy from St Ann's has been charged with violent disorder and an 18-year-old man from Mansfield Road has been charged with disorderly behaviour.
The force said retired officers and special constables have come forward to help patrol the streets on Wednesday night.
Mounted police will be out from 19:00 to 07:00 BST.
Assistant Chief Constable Paul Broadbent said: "We'll have more officers on the street tonight.
"Of the 400 people that have been arrested right across the country, a quarter of those were arrested in Nottingham.
"We're absolutely not tolerating any kind of criminal behaviour whatsoever."
Officers said social networking sites would be monitored throughout Wednesday night to track down troublemakers.
ACC Broadbent said: "Social networking is both a hindrance and a help because it spreads good positive messages quickly and we can also communicate very effectively.
"We're monitoring that minute-by-minute, as you would expect, and that's helping us respond to keep the public safe."
Hundreds of officers were deployed to deal with the unrest on Tuesday. Three received minor injuries.
Stations in The Meadows, Bulwell and St Ann's were targeted, while Canning Circus station was set alight after fire bombs were thrown at the building.
Mobs of up to 50 people also damaged cars, pubs and shops in areas including Basford, Mapperley and Radford.
A crowd of about 30 people attacked houses and cars in the St Ann's area on Monday night.
Nottingham City Homes has said it will seek to evict anyone who is directly involved, or whose sons or daughters have been involved in disturbances.