100 cases were documented in a small number of regions, although not including Chechnya where incidences are said to be much higher.
In some cases convicted prisoners were employed by officials to torture suspects, the report says. Suspects were also regularly denied access to lawyers, it adds.
The human rights organisation accused state investigators of transferring suspects to inaccessible parts of the justice system such as prison colonies, blocking access for independent monitors and preventing publication of expert reports.
"HORRENDOUS REPORTS"
Amnesty called on the Russian government to protect the rights of those in detention.
"We are hearing horrendous reports of prisoners being tortured in police detention in Russia – beatings with fists, plastic bottles full of water, books, truncheons and poles, of suffocation, the use of electroshocks and of organised rape," said UK campaign director Tim Hancock.
"It’s a litany of horror and has no place in any decent justice system."
The report gave the example of Yekaterinburg, where it alleged that at least 30 male suspects were systematically tortured in a punishment block of the local prison between 2004 and 2006.
Convicted prisoners were allowed 24-hour access to suspects’ cells, it added, saying that some victims mentioned a special room where suspects were raped.
Detainees were forced to sign confessions, an indication that police were coming under pressure to solve crimes, Amnesty said.
The report documented 100 cases in 11 out of the country’s 89 regions.
But it did not include Chechnya, where human rights groups have accused Russian and pro-Moscow Chechen security forces of widespread abuses, or other regions of the North Caucasus.
