Police in Northern Ireland have arrested four men in connection with the murder of journalist Lyra McKee.
The four suspects, aged 19 to 33, were arrested near Londonderry on Wednesday morning.
They were arrested on suspicion of terrorism and serious crimes, police said on Twitter.
McKee was shot dead on April 18, 2019 during riots and clashes with police in the Catholic district of Creggan, near the Irish border.
A Republican dissident group, the New IRA, had admitted responsibility for her death, saying the 29-year-old journalist was “on the side of enemy forces”.
The group – which opposes the 1998 Good Friday peace accord – had sent its “sincere and unreserved apologies” to those close to it.
Last February, police charged 52-year-old man with McKee’s murder while saying that at least more than one person was involved in the crime and the man who fired the shot that killed her was still at large.
In July 2020, a A 27-year-old man was also arrested in connection with the investigation.
“These arrests are the culmination of a detailed two-year investigation into Lyra’s murder and the events leading up to it,” said Detective Superintendent Jason Murphy, Police Chief of Northern Ireland.
“The local community has supported the police throughout this extended investigation and I would like to thank them for their continued support and patience,” added Murphy.