"The claims of so-called genocide in Tibet are sheer libel, sheer fabrication," said Chinese Foreign Ministry spokesman Liu Jianchao at a regular news briefing.
Liu said Beijing was opposed to any interference in its internal affairs, including on issues regarding Tibet.
A Spanish judge opened proceedings Monday in a lawsuit brought by the Madrid-based Committee to Support Tibet. The group filed the suit against several former Chinese officials under a Spanish law allowing prosecution of human rights crimes even if they were committed in another country.
In its lawsuit, the human rights group says that more than 1 million Tibetans have been killed or gone missing since China occupied Tibet in 1951, according to the AP.
Russia has changed its position on the meeting of Russian President Vladimir Putin with his Ukrainian counterpart Volodymyr Zelensky