Russia's government has systematically tortured Ukrainian civilians in over 100 detention centres since the start of its invasion, the UN's human right's office says.

Its report detailed cases of mock executions, electric shocks and the use of prolonged stress positions on Ukrainian citizens for non-criminal acts, such as criticising Russia's invasion, which it said had proved fatal in some cases.

It said the centres were located inside Russia and occupied parts of Ukraine.

"It's widespread and systematic torture," UN Human Rights Monitoring Mission head Danielle Bell said.

" It was documented in every region of occupied territory, as well as dozens of regions inside the Russian Federation. "

The UN report is based on interviews with 215 former detainees who gave detailed accounts o

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