The United Nations has told The Times, Censor.NET informs.
Ivan Simonovic, UN assistant secretary-general for human rights, said that in some areas Kyiv's "disregard for human rights" had become entrenched and systemic and needed to be urgently addressed.
The UN report documents hundreds of cases of illegal detention, torture and ill-treatment of detainees - both by pro-Russian armed groups and by government agencies.
It draws attention to prisoner abuse and murders by pro-Russian rebel groups, but also exposes the scale and brutality of Ukraine's government-backed torture program, the newspaper reads.
Earlier, The United Nations Subcommittee on Prevention of Torture (SPT) conducted monitoring all penitentiary institutions on its agenda in Ukraine, but was denied access to SBU units in Mariupol and Kramatorsk for an unplanned visit.