Authorities in Northern Ireland have appealed for calm after a 29-year-old woman was killed in what police are calling a "terrorist incident."
Shots were fired on Thursday in the Creggan area of Londonderry, according to police. Images from the scene showed cars alight as a crowd threw fireworks and petrol bombs at emergency vehicles. The city -- which is also known as Derry -- is a short drive from the border with the Republic of Ireland.
"Sadly I can confirm that following shots being fired tonight in Creggan, a 29-year-old woman has been killed," assistant chief constable Mark Hamilton said on Twitter. "We are treating this as a terrorist incident and we have launched a murder inquiry."
Northern Ireland has two main political parties, the Democratic Unionist Party and Sinn Fein. The Sinn Fein deputy leader, Michelle O'Neill, condemned those responsible for the killing in Derry, describing it as "a senseless loss of life."
"I am shocked and saddened at the tragic news that a young woman has been shot dead by so-called dissidents in the Creggan estate tonight," said O'Neill.
"The murder of this young woman is a human tragedy for her family, but it is also an attack on all the people of this community, an attack on our peace process and an attack on the Good Friday Agreement."