UN Secretary General is ready to act as a mediator for the settlement of Ukrainian crisis, his spokesperson Stéphane Dujarric told ITAR-TASS.

As regards personal participation of Ban Ki-moon, he continues contacts with the Russian and Ukrainian leaders, he added. His mediation efforts are always available, Dujarric said.

Earlier Russia's permanent representative at UN Vitaly Churkin called for immediate involvement of Ban Ki-moon in the efforts to stop violence in eastern Ukraine.