The three were gunned down on Sept. 16 from shots that apparently were fired with a silencer gun from a car that sped away. Their deaths increased to six the number of Chechens who have been killed in Turkey since 2008.

Turkey-based Chechen groups have blamed Russia’s secret service for the killings. Turkish authorities have not commented.

Turkey’s Dogan news said Saturday that dozens of Chechens and members of Turkish pro-Islamic groups marched toward the consulate to protest the deaths and demand that that killer or killers be arrested.

Dogan said police prevented the group from approaching the heavily guarded consulate building.