Gunshots have been heard at the building.
A photo has been released on social media showing someone pointing a gun at the head of Kiraz against the backdrop of a flag from the organization.
According to a statement carried on halkinsesi.tv, a site that is close to the DHKP-C, the perpetrators have given authorities until 3:36 p.m. to meet the demands of the group.
The demands include a live confession by the police officers suspected of killing Elvan, the prosecution of the officers responsible in a “people’s court,” the acquittal of all people being tried for participation in solidarity rallies for Elvan, as well as other requests.
Police have cordoned off the sixth floor of the courthouse where Kiraz's room is located.
Special teams have been dispatched to the scene, while it remains unknown how the assailants entered the building with a gun.
Elvan died on March 11, 2014, 269 days after he was sent into a coma when he was struck by a tear-gas canister during the Gezi protests.