A 29-year-old woman has been shot dead in Londonderry in what police are treating as a "terrorist incident".
Dissident Republicans are being blamed for the killing, which happened during rioting after police searches in Derry's Creggan area on Thursday night.
Petrol bombs were also thrown at police Land Rovers.
Assistant Chief Constable Mark Hamilton said the police were "treating the shooting as a terrorist incident" and a murder inquiry had been launched.
There are reports that the trouble broke out after police raids on houses in the Mulroy Park and Galliagh areas.
I was standing beside this young woman when she fell beside a police Land Rover tonight in Creggan #Derry. I called an ambulance for her but police put her in the back of their vehicle and rushed her to hospital where she died. Just 29 years old. Sick to my stomach tonight pic.twitter.com/F0GHHd3HPz
— Leona O'Neill (@LeonaONeill1) April 18, 2019
Sinn Féin deputy leader Michelle O'Neill said she was "shocked and saddened at the tragic news", adding: "I unreservedly condemn those responsible for killing this young woman."
DUP leader Arlene Foster tweeted: "Heartbreaking news. A senseless act. A family has been torn apart."
And Mark H Durkan, SDLP MLA for Foyle, tweeted: "Just leaving Creggan, heartbroken and angry at the senseless loss of a young life.
"Violence only creates victims, that's all it ever has done. The thoughts and prayers of our city are with the young woman's family and friends, may she rest in peace."