US President Barack Obama has sought to play down concerns over Russia's decision to supply Iran with surface-to-air S-300 missiles, Big News Network reported.
Obama said in an MSNBC interview on April 21 that the United States continues to object to the sale.
But he said, "Even if they've got some air defense systems, if we had to, we could penetrate them."
Russian President Vladimir Putin last week removed the ban on supplying Iran with the S-300 air defense missile system, paving the way to conclude a long-delayed contract.
The move raised concern that such sales could embolden Tehran in talks with leading world powers about curbing its long-disputed nuclear program.
The United States has not ruled out possible military action to stop Iran from acquiring nuclear weapons if diplomacy fails.