Three men remain in hospital in Peterborough after being shot on a travellers' site on the outskirts of the city.
Two were in a critical condition and the third was described as "stable".
Armed police were called to the Oxney Road site at 10am yesterday but say exact details of what happened remain unclear.
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Nottinghamshire Police's Chief Constable Craig Guildford has released a statement to reassure people following yesterday’s terrorist attack.
The man police believe to be responsible for the terrorist attack in Westminster was most recently living in the West Midlands.
Police have raided a second flat in Birmingham in connection to yesterday's terrorist attacks in London.