© AP Photo/ Lauren Victoria Burke
US defensive weapons may become part of the arsenal of an oligarch-sponsored part of the Ukrainian army if Washington decides to provide military assistance to Ukraine, US Congressman Dana Rohrabacher said.

"Do we see any of these weapons becoming part of the arsenal of that part of the Ukrainian army, which I believe the third of the Ukrainian army now that is in conflict, that is financed by the oligarch, a private citizen who happens to be a multi billionaire," Rohrabacher asked US Assistance Secretary of State Victoria Nuland at a hearing in US Congress on Wednesday.

Rohrabacher query came as many members of US Congress are advocating that the United States provide defensive weapons to Ukraine.

The United States has been assisting Ukraine with economic and non-lethal military support since the Kiev government began a military operation against independence supporters in Ukraine's eastern regions of Donetsk and Luhansk last April.

In December, US Congress authorized the allocation of $350 million to arm the Kiev government. However, US President Barack Obama has not enacted the legislation.

While members of the Obama administration and US Congress have stated their support to arm Ukraine, US NATO allies Germany, France, Spain and Italy have opposed the measure.