Iran has released the first photos of the wreckage of a US spy drone which was shot down early Thursday after intruding into the Iranian airspace.

The IRGC Aerospace Force displayed parts of the doomed drone on Friday noon, refuting earlier claims by the US that the drone was flying over international waters, and had not violated the Iranian airspace.

Photo of the wreckage of a US spy drone shot down by the IRGC air defense forces on Thursday morning. The debris was displayed on Friday. (Photo by IRIB News Agency)

The Islamic Revolution Guards Corps said Thursday it had shot down the unmanned US aircraft after it breached the country's airspace.

Iran issued "numerous" warnings before shooting down the aircraft, Brigadier General Qader Rahimzadeh, the second-in-command of Iran's Khatam al-Anbia Air Defense Base, said on Friday.

The last warning was issued at 3:55 am, ten minutes before the shoot-down, IRGC Aerospace Commander Brigadier General Amir Ali Hajizadeh said.

He made the remarks to reporters on the sidelines of an exhibition held in Tehran to showcase the drone's wreckage.

US President Donald Trump initially issued a series of cataclysmic threats, insisting that the RQ-4 Global Hawk was flying over international waters when it was taken down by an Iranian missile.

However, the GPS coordinates released by Iran put the drone eight miles off the country’s coast, inside the 12 nautical miles from the shore, which is Iran's territorial waters.

Photo of the wreckage of a US spy drone shot down by the IRGC air defense forces on Thursday morning. The debris was displayed on Friday. (Photo by IRIB News Agency)

Iranian Deputy Foreign Minister Abbas Araqchi earlier told the Swiss envoy that "there are irrefutable evidence about the presence of this drone in Iran's airspace and even some parts of its wreckage have been retrieved from Iranian territorial waters."

Swiss ambassador summoned

The Swiss envoy, whose country represents the US interests in Iran, was later summoned to the Iranian foreign ministry on Friday morning, and received an official note which he said will immediately deliver to the US.

In a meeting with an Iranian foreign ministry official, Swiss Ambassador Markus Leitner was asked to tell the US that the Islamic Republic is not after a war with any country, but the Iranian Armed Forces will give a "crushing response to any aggression."

The Swiss envoy was told that the US will be held accountable for the consequences of such provocative measures.

“The Armed Forces of the Islamic Republic of Iran will show restraint as long as possible to preserve the security and tranquility of the sensitive region of the Persian Gulf and the Sea of Oman.

"But if the other side takes a provocative and unconsidered move, they will not hesitate to give a reciprocal response with unpredictable consequences,” the Iranian official noted, saying the response will be detrimental to all parties involved.

In a letter on Thursday, Iran's Ambassador to the UN Majid Takht-Ravanchi told the United Nations that the international community needs to confront Washington's destabilizing actions.

“Iran condemns, in the strongest possible terms, this irresponsible and provocative wrongful act by the United States, which entails its international responsibility,” he wrote in a letter addressed to UN chief António Guterres and the UN Security Council on Thursday.

Takht-Ravanchi wrote that Iran had the right to defend its sovereignty according to the world body's Charter.