VIENNA, Nov. 20 - Prospects for peace in eastern Ukraine are "bleak", underscoring the need to uphold a shaky ceasefire between government forces and pro-Russian separatist rebels, a senior official from the OSCE security watchdog said on Thursday, Reuters reported.

Swiss diplomat Heidi Tagliavini, the Organization for Security and Cooperation in Europe's envoy to the Trilateral Contact Group that includes senior representatives from Ukraine and Russia, said there was no alternative to peace accords signed in Minsk in September, no matter how dire the situation.