Dissident republicans are making a “concerted effort” to kill police in Northern Ireland, a senior officer said.
Police were attacked with petrol bombs and missiles as they carried out searches targeting dissident republicans in Londonderry.
A bonfire festooned with flags and abusive placards about the soldier being prosecuted for murders on Bloody Sunday is being treated as a hate incident.
Police in Londonderry were attacked with dozens of petrol and paint bombs overnight.
Police and members of a Protestant loyal order came under attack by petrol bombers in a night of unrest in Londonderry.
Potential Prime Minister Boris Johnson has pledged to end “unfair” prosecutions of veterans who served in Northern Ireland.