The third anniversary of the murder of Lyra McKee in Derry is being marked by the PSNI today, with a fresh appeal.
The 29 year-old journalist was killed when rioting broke out in the city on the 18th of April 2019.
Police in the North says so far 30 arrests have been made and nine people have been charged, three with murder and six with public order offences.
They say they still need the public's help and are asking anyone with information to contact detectives in absolute confidence by calling 101.