It is quite ironic that the bloody events in Ukraine are taking place just when the West P5+1 and Iran are starting a second round of talks in Vienna in order to solve differences over Iran's controversial nuclear program.

At first glance these two events may not have much in common and yet ...

A closer look shows that they are if not entirely related at least interdependent :

Lavrov: No need for European missile defense shield if Iran deal a success (November 25, 2013)

Below are a compilation of articles I found or came across which suggest that Ukraine may have sold nuclear Warheads to Iran and that the East European country's government has been to date a passionate advocate of lifting the Iran Sanctions. 

If anything they highlight the Geo-strategic concerns which can only be magnified by the recent developments in regard to both of situation in Ukraine as well as the difficulties of reaching a satisfying agreement between the P5 + 1 over Iran's nuclear program. Also do look at the chronology of the articles posted which show that Ukraine's government until very recently has been a staunch ally of the Islamic Republic's nuclear ambitions.

KAHLILI: Iran already has nuclear weapons (Washington Times, October 27, 2011)

Kiev Ukraine News Blog: Did Ukraine Sell Iran Nuclear Warheads? (April 4th, 2006)

Ukraine hails agreement to implement Iran nuclear deal (Feb 14th, 2014) 

Press TV- Ukraine urges lifting Iran sanctions over Tehran's nuclear program (Feb 1st, 2014)

PressTV - Israeli ex-officer leads Ukraine protests: Reports (Feb 16th, 2014)