Russian investigative journalist Ivan Golunov was placed under two months’ house arrest in Moscow.
Golunov, 36, is accused of large-scale drug dealing.
Illegal drugs were found in his rucksack, according to Moscow police.
He was on his way to a meeting with a source on Thursday when he was detained in central Moscow.
A lawyer for Golunov said he believed police had planted the drugs on his client to frame him.
Golunov denies the charges.
He said, he did not commit a crime, have nothing to do with the drugs and ready to cooperate with the investigation.
He was beaten up by the police and was taken to a hospital for head injuries, multiple chest abrasions and bruised ribs.
A doctor said the medical examination of doctor had not shown evidence of any serious injuries.
Journalists critical of the government have led a dangerous existence and at least 58 journalists have been killed in Russia since 1992.