Kerry and Zarif (archive)
Kerry and Zarif (archive)Reuters

Secretary of State John Kerry on Wednesday called his Iranian counterpart to protest Tehran's latest round of ballistic missile tests, AFP reported.

Iran and the United States have no formal diplomatic ties, but Kerry and Foreign Minister Mohammad Javad Zarif built a close working relationship during negotiations for last year's nuclear accord between Tehran and world powers.

The phone call comes several days after Iran claimed to have conducted more ballistic missile tests. Furthermore, during those tests the head of Iran's Revolutionary Guards declared that Israel is "in range of most of our missiles."

The United States says that a series of recent apparent missile tests by Iran breach the terms of a UN Security Council resolution and will result in new economic sanctions -- either from Washington or the world body.

"If they are confirmed, if they're true, as I said yesterday, we'll take up the appropriate action inside the UN," State Department spokesman John Kirby warned Wednesday, according to AFP.

"But I don't want to convey the impression that we are only looking at multilateral or UN possibilities in terms of measures to deal with it," he added.

Earlier on Wednesday, U.S. Vice President Joe Biden, who is visiting Israel, said the United States would take action against Iran if its long-range ballistic missile tests were confirmed.

Later, Democratic presidential candidate Hillary Clinton blasted Iran over reports of further ballistic missile tests and called for new sanctions on the Iranian regime.

“Iran should face sanctions for these activities and the international community must demonstrate that Iran’s threats toward Israel will not be tolerated,” she said, though she also emphasized the need to preserve the framework of the Iranian nuclear deal negotiated by the Obama administration last year.

“This demonstrates once again why we need to address Iran’s destabilizing activities across the region, while vigorously enforcing the nuclear deal,” said Clinton.