The trial of Ukrainian pilot and parliament member Nadia Savchenko, who has been jailed in Russia since July 2014, may start within weeks, her lawyer said.
Ilya Novikov said on July 2 that Savchenko and her defense team had certified that she had finished reviewing the criminal case material and the preliminary hearing may be held in late July or early August.
Savchenko says she was illegally brought into Russia after being abducted by Russian-backed separatists in eastern Ukraine.
She is charged with complicity in the killing of two Russian journalists who died in the Ukraine conflict, as well as illegal border crossing.
Savchenko denies the charges and says Russia has no right to detain her.
The West has repeatedly called for her immediate release.
A Moscow court on June 10 extended Savchenko's pretrial detention until September 10.