Two teenagers have been arrested in relation to the death of a Northern Irish journalist shot dead during riots on Friday.
Lyra McKee was shot dead during rioting in Londonderry's Creggan Estate after a raid by police trying to prevent attacks by republican militants opposed to the 1998 Good Friday peace deal.
Her death came shortly after she posted an image on Twitter of the violence, which she called "absolute madness". She had been standing near a police vehicle when she was shot.
Two men, aged 18 and 19, have now been in relation to her murder under the Terrorism Act.
Both have been taken to Musgrave police station in Belfast.
The shooter was believed to be linked to the dissedent republicans.
CCTV footage of the shooting showed a masked attacked lean from cover and shoot towards police and other bystanders.
Saoradh, a political party with links to militants who embrace violence to merge Northern Ireland with Ireland, said in a statement it understood McKee was killed accidentally.
On Friday it was the 21st anniversary of the 1998 Good Friday deal, which led to the decommissioning of weapons held by militant groups and was intended to bring peace to the region.
Republicans want Northern Ireland to join Ireland, while others wish it to remain within the United Kingdom.
British Prime Minister Theresa May called it "shocking and truly senseless" while Irish Prime Minister Leo Varadkar condemned the shooting as an act of hate.