Anna Duritskaya, a 23-year-old model, said she had known Nemtsov for three years

Russian police are still questioning the Ukrainian girlfriend of opposition politician Boris Nemtsov, who was with him when he was shot dead in Moscow.

Anna Duritskaya's lawyer told Russian media that she was anxious to go home temporarily to see her mother in Kiev.

"I don't understand why I'm still on Russian territory," she told Russia's independent TV Rain (Dozhd).

Police were holding her for safety reasons, she said. But her lawyer said the police "are acting correctly".

The killing took place on Friday night on Great Moskvoretsky Bridge, near the Kremlin wall.

Mr Nemtsov, 55, had just been dining at a restaurant with Ms Duritskaya.