Two men, aged 18 and 19, were arrested over the killing of journalist Lyra McKee on Thursday night and detained under the Terrorism Act.
29-year-old Lyra was shot during rioting in the Creggan area of Derry and later died at Altnagelvin Hospital after being brought there by police.
The two teenagers, arrested by PSNI were released without charge regarding her murder.
The journalist and activist is survived by her partner Sara Canning and her family.
A funeral for the 29-year-old will be held on May 1st.