The mother of two suspects in the slaying of Russian opposition leader Boris Nemtsov says is certain they didn't do it.

Anzor and Shagid Gubashev are among five men, all ethnic Chechens, accused in the Feb. 27 killing.

Their mother, Zulai Gubasheva, told the Associated Press that she "will never believe they did it" and she "didn't bring them up for this."

She said her sons, now in their early 30s, left for Moscow years ago because they couldn't find work in Chechnya. The elder, Anzor, was later offered a job in the Chechen police force, but she discouraged him and he returned to the Russian capital.