A member of Iran's National Security Committee in the Parliament admitted Washington has warned the regime off involvement in the conflict which has already claimed thousands of lives.

Abbas Golroo said, "The Americans ... sent us a message not to get involved in the war".

Shortly after the attack launched when thousands of Hamas militants infiltrated Israel by land, sea and air, the US began moving warships and aircraft to the region in support of Israel and as a warning to the regime.

On Friday, a second carrier strike group will begin making its way to the Mediterranean in addition to scores of aircraft already heading to US military bases around the Middle East.

Munitions have already arrived in Israel and special operations forces are now assisting Israel’s military in planning and intelligence.

While thousands of Israelis and Palestinians are dying in the war declared by Hamas last Saturday in the single most deadly day in Jewish history since the Holocaust, he said the Hamas onslaught is a “legitimate defense” as per the United Nations Charter.

He made the remarks on Saturday as the regime's top leadership expressed solidarity with the terror group for the unprecedented attack which took Israel by surprise on a religious holiday in a haunting reminder of the Yom Kippur War 50 years ago.

“The operation carried out by Palestinians was notably intricate, involving elements of cyber warfare, drones, aerial assaults, ground advancements, and field actions," he said. "It was executed with an element of surprise, resulting in casualties and significant damage to Israel.”

Golroo added that the Islamic Republic has consistently shown support for Palestine, and it has provided assistance, indicating a long-standing commitment to the Palestinian cause.