Opposition groups in Kyrgyzstan said they had seized power after taking control of government buildings during post-election protests in the strategically important Central Asian state.
Jeenbekov said the country, which hosts a Russian air base and a large Canadian-controlled gold mine, was facing an attempted coup.
He called for calm and ordered security forces not to open fire on protesters on Monday after overnight unrest in which the government said one person was killed and 590 wounded. Officials said later the vote would be rerun, but it was not clear who would run it.
Kyrgyzstan, which borders China and is a close ally of Russia, has long been a platform for geopolitical competition between Moscow, Washington and Beijing and has a history of political volatility: two of its presidents have been toppled by revolts in the past 15 years.