FNA- Secretary of Iran's Supreme National Security Council (SNSC) Ali Shamkhani underlined that Washington's threats can no way make Tehran change its principled policies in the region and block its increasing defense advancements.

"The Americans' threatening literature against Iran has no impact on Tehran's principled policies on the region, enhancing the conventional defense capabilities and continued support for the nations which are oppressed by the arrogance system," Shamkhani said in a meeting with Belgian Parliament Speaker Siegfried Bracke in Tehran on Saturday.

Elsewhere, he referred to the recent terrorist incidents in Europe, and said, "They showed that instrumental use of terrorism by certain countries in Iraq and Syria makes this ominous phenomenon uncontrollable and spreads it to the heart of Europe."

Baracke, for his part, appreciated Tehran's efforts in campaign against the terrorist groups in the region, and said, "Iran is a contributor to regional security and has played an important role in fighting terrorism."

Shamkhani's remarks came after Commander of Iran's Islamic Revolution Guards Corps Aerospace Force Brigadier General Amir Ali Hajizadeh said Iran is in possession of domestically-made 10-ton father of all bombs with a high destructive power, adding that the IRGC has penetrated into the US military command centers and collected evidence of their support for the ISIL terrorists.

"Following a proposal by the Aerospace Force of the Islamic Revolution Guards Corps (IRGC), Iran�s Defense Industries Organization manufactured a 10-ton bomb; these bombs are at our disposal and can be launched from Ilyushin aircraft and they are highly destructive,� General Hajizadeh said in a televised interview on Friday.

The commander pointed to the ordnance as Iran�s �father of all bombs� as compared with the GBU-43/B Massive Ordnance Air Blast Bomb (MOAB), also known as the "mother of all bombs," which the US Air Force dropped on tunnels in Afghanistan�s Nangarhar province from an MC-130 aircraft in April.

The MOAB weighs about 22,000 pounds (9,800 kg), and was said to be the most powerful non-nuclear weapon ever designed. It was developed during the US war on Iraq and is intended to target large below-surface areas.

General Hajizadeh also said that over the recent years, the IRGC has penetrated into the US military command centers and has evidence of their support for the ISIL terrorists.

"We have documents showing the behavior of the Americans in Iraq and Syria; we know what the Americans did there; what they neglected and how they supported Daesh (the ISIL),� General Hajizadeh said.

He reiterated that if the IRGC is allowed to release those documents, it would bring about more "scandals" for the US.

"The Americans, among others, have come to Iraq and Syria to disintegrate them, but what eventually happened was Iran�s will. I see no army in the world to be on a par with the IRGC," General Hajizadeh added.

Iran has repeatedly insisted that its military capabilities are solely aimed for defense purposes and they pose no threat to other countries. The country has also been assisting its allies, including Iraq and Syria, in their ongoing fight against terrorism.

In June, the IRGC fired six medium-range ballistic missiles at the ISIL targets in Deir Ezzur province in Eastern Syria in response to a June 7 terrorist attack in Tehran, which killed 18 people.