Saudi Arabia sent its national guard troops in order to reinforce its forces in the southern border.
The head of Iran's Revolutionary Guard Monday accused Saudi Arabia of treachery, the official IRNA news agency reported.
"Today, the treacherous Saudis are following in Israel's footsteps," said Gen. Mohammad Ali Jafari..
"Saudi Arabia is shamelessly and disgracefully bombing and mass killing a nation that is fighting against the arrogant system, or world powers,” he said.
He was apparently referring to Yemen, where a Saudi-led coalition has been waging a month long air campaign against Iran-supported Shiite rebels, known as Houthis.
Iran has provided the Houthis with political and humanitarian support but denies arming them.
The Houthis seized the capital, Sanaa, last year, and Yemen's internationally recognised president has fled the country.
The vanguard of National Guard troops "have arrived in Najran region to participate in the defense of the southern borders... so as to confront any possible threats," the official Saudi Press Agency said.
Before Saudi Arabia was asked to stop air strikes and give an end to the Operation Decisive Storm, King Salman had ordered guard troops for mobilisation.
Air strikes of coalition didn’t stop despite the declaration in Yemen where Houthi rebels are supported by Iran and the former president Ali Abdullah Saleh.
Abd Rabbuh Mansur Hadi, the elected President of Yemen, has fled to Riyadh with the members of his government after strict Houthi treat against the government.
Despite the declaration, the coalition has continued daily air strikes in Yemen, where Houthi rebels are allied with army units loyal to former president Ali Abdullah Saleh.
A diplomatic source has told AFP the decision to deploy the National Guard was made the week prior to King Salman's announcement.
The national guard troops are formed from tribes which have traditionally backed the rule of the Saud dynasty since it spread its Sunni rule in the Arabian Peninsula.
The National Guard is led by Prince Miteb bin Abdullah with about 125,000 troops.
Eight Saudi soldiers and border guards were killed in armed skirmishes along the frontier during the Operation Decisive Storm.
The United Nations says more than 1,000 people have been killed during fights in Yemen since late March.