WASHINGTON (Reuters) - The Pentagon has broadcast what it said were pictures of the targeting of the US-made Al-Masri plane, which was dropped by Iran. In contrast, the Iranian Revolutionary Guards deployed pictures that said it was for a moment targeting and dropping the plane.

The US-led air force commander, Joseph Guastella, said the plane, which was dropped by Iran, was flying over the Gulf of Oman and the Strait of Hormuz on a mission to monitor international airspace when it was dropped by a surface-to-air missile from Iran's Revolutionary Guards.

"This attack - which he described as dangerous and stalemate - is an attempt to disrupt US ability to monitor the region, in the wake of recent threats to international shipping and free flow of trade," he said.

The Pentagon on Thursday also published a picture that it said was the route of the March 7 flight that Iran dropped, without providing a detailed explanation of the picture.

Reuters said the United States' deployment of the picture appeared to be an attempt to reinforce its account that the plane had been shot down in international airspace.

For his part, announced the Iranian Revolutionary Guard to drop what he described as a "spy" American march as it entered Iranian airspace in the south of the country.

The IRGC said Tehran did not want the war but was fully prepared.

US President Donald Trump said Iran had made a serious mistake by dropping the US aircraft, saying the response would soon be determined, while Tehran insisted the target plane was flying over its airspace.