Crimestoppers is offering a 10-thousand pound sterling reward for information about the murder of Lyra McKee.
Lyra was shot dead during riots in Derry last Thursday.
Her killing has led to new calls for Northern Ireland's political leaders to talk about restoring power sharing.
Anyone who has any knowledge of the events that led to Lyra's death are urged to come forward and tell UK crimestoppers what they know.
How to Contact UK Crimestoppers
All calls made to the UK Crimestoppers are taken confidentially via telephone or using an anonymous online form.
To call Crimestoppers dial 0800 555111 or visit Crimestoppers-uk.org to fill out the anonymous online form.
At Lyra's funeral yesterday the presiding priest, Martin McGill, criticised politicians for not yet reaching a settlement.
