Iran’s Revolutionary Guards said Saudi Arabia was behind the attacks. The Islamic State (IS) group has claimed it carried out the attacks, which would be a first in Iran. In a statement, the group said five of its fighters had taken part and warned of further attacks against Iran’s Shia Muslim majority.
President Hassan Rouhani said Iran’s message was that “terrorism is a global problem”, and he called for “regional and international co-operation and unity”.
Iranian authorities denied that there had been a hostage situation inside the parliament building. Reports said the gunmen had entered parliament via a public entrance, dressed as women. Security forces surrounded the parliament, and TV footage showed people, including children, escaping from windows. Iranian media later reported that four attackers inside the parliament building had been killed by security forces.
At about 10:40 (06:10 GMT) attackers at the mausoleum in southern Tehran, which is dedicated to the Islamic Republic’s founder Ayatollah Khomeini, opened fire. The governor of Tehran said one attacker there had detonated a suicide vest and another had been killed by security forces, state broadcaster Irib reports.
It is not clear whether the death toll of 12 includes the attackers, or whether the victims were killed at both incidents or solely at the parliament. About 40 people were injured in the two attacks, according to emergency services chief Pir Hossein Kolivand. Iranian officials say they managed to foil a third attack.