U.S. Secretary of State Mike Pompeo on Saturday condemned what he described as Iran's testing of a medium-range ballistic missile capable of carrying multiple warheads as a violation of the international agreement on Tehran's nuclear program.

Amid tension between Washington and Tehran over ballistic missiles, Pompeo warned in a statement released on Twitter that Iran is increasing its "testing and proliferation" of missiles and called on the Islamic Republic to "cease these activities."

President Donald Trump pulled out of an international nuclear agreement in May and reimposed sanctions on Tehran, criticizing the deal for not including curbs on Iran's development of ballistic missiles or its support for proxies in Syria, Yemen, Lebanon and Iraq.