Iran’s IRGC has reported a new confrontation with U.S. warships in the Persian Gulf as tension between the two countries reaches its peak.

This is the second time such incidents occur between the two countries in less than a wekk.

“At 4 p.m. local time (1130 GMT) on Friday, the supercarrier USS Nimitz and its accompanying warship, while being monitored by the IRGC Nay’s missile frigates, flew a helicopter near the Resalat oil and gas platform and approached the IRGC’s ships,” IRGC Navy said in a statement on Saturday.

“The US made a provocative and unprofessional move by warning the Iranian vessels through firing flares,” the statement read, adding that the Iranian forces continued with their mission “in disregard of the unconventional and unusual behavior of American vessels” that later left the region.

Iran accuses Washington of deliberately provoking their naval forces in the Persian Gulf, prompting Tehran to issue several warnings to the U.S. about their behavior.

A similar incident occurred a few days ago in the northern Persian Gulf, where a U.S. Navy ship fired two shots toward an IRGC Navy ship which was patrolling in international waters.

The IRGC said following Tuesday’s incident it had neutralized the U.S. Navy move.