Russian President Vladimir Putin's spokesman says "hysteria" in Ukraine and the West over imprisoned Ukrainian pilot Nadia Savchenko is interfering with resolving her court case.

Dmitry Peskov, in remarks reported Saturday by the state news agency RIA Novosti, gave no details on what resolution measures were being considered. There is persistent speculation that she could be traded for two Russians who face trial in Ukraine on allegations they were active-duty soldiers working with Russia-backed rebels in eastern Ukraine.

Savchenko has been sentenced to 22 years in prison for calling in coordinates for shelling that killed two Russian journalists in eastern Ukraine. The United States, Western European countries and Ukraine have called for her release.

Peskov says "such a case can be resolved much more easily and quickly in quietness."