TEHRAN, IRAN — ISIS has claimed responsibility for two terrorist attacks in Tehran on Wednesday that killed at least 12 people and injured 46 others. <br /> <br />The attacks began at Iran’s Parliament at around 10:30 a.m, where four attackers disguised as women killed 11 people and wounded dozens of others, the New York Times reported. <br /> <br />At least one attacker blew himself up on the fourth floor of the building. It took Iranian authorities several hours to kill the attackers and end the siege. <br /> <br />At the same time as the assault on Parliament, two terrorists attacked the mausoleum of Ayatollah Khomeini, where they detonated explosives at the western entrance. <br /> <br />One victim was killed at the shrine and both of the attackers committed suicide. <br /> <br />Iranian officials blamed Saudi Arabia and the United States for the attacks, even though ISIS said it was responsible. <br /> <br />Iran is a predominantly Shiite Muslim country. The Shiite faith is regarded as heretical by Sunni Muslim ISIS militants. <br /> <br />Forces backed by Iran are at war with ISIS in Iraq and Syria. If ISIS’s claims are true, this would be the group’s first successful attack on Iranian soil.