The annual Bloody Sunday black ribbon campaign to commemorate the 1972 massacre was launched in the city yesterday.
The Mayor of Derry, councillor Martin Reilly, was the first to receive a ribbon at the Museum of Free Derry.
Relatives of several of those who were murdered on Bloody Sunday were at the museum for the launch.
John Kelly, whose brother, Michael, who among those who died, encouraged people to wear the ribbon to show their support for the families.
“It is vitally important that people wear the ribbon to highlight the injustice of what happened on Bloody Sunday.
“It is also an opportunity for people to show their support for the families in the ongoing quest for justice.
“We are extremely grateful to the people of Derry for thieir support through the years and we also thank the mayor for helping us launch the ribbon at the museum.”
The black ribbon and Bloody Sunday badge are on sale at venues throughout the city.