In the most recent round of cyber attacks against the Iranian official sites at least 50 websites belonging to Iran's Foreign Ministry were hacked on June 1.
The hacker group that calls itself "Team Bad Dream" attacked the websites of Iranian embassies and consular offices across the world, Iran's semi-official Tasnim news agency reported June 2.
The hackers, who are allegedly Saudi, sent the websites down and posted a message of their own on the main pages including a photo of the Saudi kings.
Some of the attacked websites have not been recovered yet.
The attacks against Iranian official websites started May 24 as a group calling itself DAES hacked the website of the Statistical Center of Iran, sending the website down for a short time.
Two days later the websites of Iran's Culture Ministry, the legal deputy of the Judiciary and the interpreting administration of the Judiciary were hacked as well.
Some Iranian officials claimed that Saudi Arabia was behind the attacks carried out by the DAES hacker group.
"We monitored a cyber attack on May 24, which was conducted from three countries and led by the hackers in Saudi Arabia, and they launched an attack on the Statistical Center of Iran," head of Iran's Cyber Police (FATA), Brigadier General Seyed Kamal Hadianfar said.
However, he said there is no reason to think that the Saudi government has been involved in the DAES cyber attack.
Head of Iran's Civil Defense Organization Brigadier General Gholam Reza Jalali also said that a group of Saudi hackers launched cyber attacks on a number of Iranian government websites, but failed to incur major damage.
"Saudi Arabia sought to materialize its threats through such attacks, but it was mostly a type of show-off," Jalali told Iran's semi-official Fars news agency May 28.
Iranian media reported May 26 that two Saudi statistics agencies' websites were hacked just a day after the Iranian Statistical Center's website got hacked, which raised the speculation in some Iranian media that a Saudi-Iranian cyber war is already going on.