Detectives investigating the murder of journalist Lyra McKee have searched the headquarters of the republican Saoradh organisation.
They seized items in the Chamberlain Street area of Derry, but there were no arrests.
Inquiries are continuing, a Police Service of Northern Ireland (PSNI) statement said.
Ms McKee was a promising young Belfast author aged 29.
She was a bystander when she was shot in the head during rioting in Derry on April 18.
Saoradh means liberation in Irish, and it describes itself as a revolutionary Irish republican party.
It has the support of the New IRA, which admitted responsibility for Ms McKee’s killing.
She was standing next to a police vehicle in the Creggan estate when she was hit as a masked gunman fired towards police.
Police believe the violence was orchestrated in response to an earlier search by officers to avoid imminent trouble associated with the anniversary of the Easter Rising.
Detectives investigating the murder of Lyra McKee have carried out a number of searches in Chamberlain Street in Derry/Londonderry this morning.
A number of items were seized during the search for further investigation.
No arrests were made. Enquiries are continuing.— Police Service NI (@PoliceServiceNI) May 7, 2019
Several people have been arrested as part of the investigation into the murder.
Ms McKee’s death sparked calls for fresh political negotiations at Stormont to break a powersharing impasse and deliver the resumption of devolution.
Talks led by the British Government and involving the main Stormont parties began on today in response.
A mural of the journalist has been painted in Belfast.
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Just finished this mural of Lyra McKee. Sitting in the Sunflower bar now with a mutual friend of ours hearing stories about how she came along to his poetry night in this same bar, wrote a poem there and then on the night, performed it, and stole the night. . Talking to Lyra's family outside about how much she would have loved the mural, but also thought it was hilarious, and made us retake selfies infront of it. I didn't know Lyra, but I really wish I had. . Like many other people, Lyra's death has shocked and upset me. She was of a similar age to myself, and had, from what I can gather, a lot of the same beliefs and opinions as myself. Although her death has really upset me, I did not know Lyra, and I cannot even imagine how her loved ones are feeling. I just hope I have done her justice. . Nothing can bring Lyra back. Lyra did a lot of great work in her lifetime, and had a lot of great work still to do. She would have done great things. We won't get to witness the great work she would have done, but can make sure this never happens again. . In Lyra's words: Here's to better times ahead and saying goodbye to bombs and bullets. . Thanks to Lyra's family and partner Sara for being so supportive of this mural going ahead. Thanks to Adam from @seedheadarts for organising Hit The North festival every year. Thanks to @michellekuras for assisting me, to @jasonashford and to Jackie in KCC. . #lyramckee #belfast
The poignant image in the city centre was created by Dublin artist Emma Blake.
Blake and 21 other artists blanketed most of Kent Street in new artwork over the bank holiday weekend as part of the annual Hit the North street art festival.
- Press Association