Transnistria, a separatist region in eastern Moldova, requested Russia to protect it from the economic measures taken by Moldova.
From: Euromaiden Press BY SERGE HAVRYLETS

At a congress on 28 February, the so-called deputies of unrecognized quasi-state of Transnistria in eastern Moldova asked Russia to “protect” the region due to alleged economic pressure from Moldova, which has ended its special trade agreement with the breakaway region, Newsmaker reported.
Transnistria or Pridnestrovie, officially known as the Pridnestrovian Moldavian Republic, is an internationally unrecognized state, recognized as part of Moldova. Transnistria borders Vinnytsia and Odesa Oblast of Ukraine.
The appeal of the so-called deputies of Transnistria was addressed to the Federation Council and the State Duma of Russia. In their statement, the Transnistrian deputies claimed that Moldova has launched an “economic war” against Transnistria, meaning the abolition of customs benefits.