World Bulletin / News Desk 

The U.S. is troubled by the delivery of Russian-made defense missile systems to Iran, an Obama administration official said Monday.

"It's not constructive at this time for Russia to move forward with it," said State Department spokeswoman Marie Harf.

In addition, U.S. Secretary of State John Kerry raised concerns with his Russian counterpart over Russia's decision to lift a ban on missile deliveries to Iran, the White House said on Monday.

Russia's decision to start an oil-for-goods swap could also raise sanctions concerns, White House spokesman Josh Earnest told reporters at a daily briefing.

The U.S.’s reaction came after Russian President Vladimir Putin decided to lift a ban on the transfer of the systems to Iran.

Harf said Secretary of State John Kerry has spoken to Lavrov regarding the sale and the Russian move would not affect the ongoing nuclear talks.

"This is a little bit of a separate issue than the nuclear issue. We don't expect it to impact the unity on the talks."

Reiterating its strong opposition to nuclear negotiation with Iran, Israel also condemned the Russian move.

"This is a direct result of the legitimacy that Iran obtained from the emerging nuclear deal,” said Israeli Intelligence Minister Yuval Steinitz, local news reported.

White House spokesman Josh Earnest responded to Israeli concerns. The U.S. "certainly takes very seriously the safety and security of our allies in the region," he said.