A handful of Iranian Islamic Revolutionary Guard Corps vessels swarmed and harassed two US Coast Guard ships in the Persian Gulf earlier this month, The Wall Street Journal reported on Monday, citing Navy officials.

Three IRGC fast-attack boats and a larger support vessel swarmed the US Coast Guard cutters Monomoy and Wrangell while they were on patrol in international waters on April 2.

During the incident, the large Iranian support ship crossed repeatedly in front of the US vessels, at one point coming within 70 yards of the Wrangell and forcing the cutter to take evasive maneuvers to avoid a collision.