LONDON, May 4 (Xinhua) -- The International Maritime Organization (IMO) said on Monday that vessels operating near the Strait of Hormuz should continue to exercise "maximum caution," following reports of a U.S. operation to "guide" stranded ships out of the area.

In a written response to Xinhua, an IMO spokesperson said: "We are aware of the reports but do not have further details. We continue to urge ships to practice maximum caution in the area."

U.S. President Donald Trump said on Sunday that the United States would begin a transit facilitation operation on Monday to "guide" stranded ships through the Strait of Hormuz.

In response, Iranian military command warned on Monday that any foreign armed forces, particularly the United States, would be attacked if they attempt to approach or enter the strait.

The UK Maritime Trade Operations confirmed on Monday that the United States has established an enhanced security area south of the Traffic Separation Scheme in the Strait of Hormuz to support vessel transits.

However, it warned that the maritime security threat level in the area remains "critical" due to ongoing regional military activity.