Updated

Russia's prison service says one of two members of the Pussy Riot feminist punk band serving two-year sentences for an irreverent protest against President Vladimir Putin in Moscow's main cathedral has been hospitalized.

Federal Prison Service spokeswoman Kristina Belousova said Friday that Nadezhda Tolokonnikova is in a prison hospital in the province of Mordovia in western Russia, the site of her prison colony. Belousova refused to specify Tolokonnikova's illness or comment on her condition, saying only that she has "nothing serious."

Yekaterina Samutsevich, a band member who also was sentenced to two years in August but later released on appeal, says Tolokonnikova was suffering from headaches. Samutsevich said on Rain TV that Tolokonnikova also says she feels tired after working long hours with little rest.