Iranian media stated that the attackers attempted to enter the building to scale a larger attack. The official news agency IRNA later confirmed that the three attackers were killed by security forces. The Fars news agency said that the assault may have involved a suicide bomber.

At least 8 killed, 13 injured in terrorist attack on judiciary centre in Iran

At least five people were killed and 13 were injured after unidentified gunmen threw a hand grenade into a courthouse in Iran's Sistan-Baluchestan province on Saturday.

Iran terrorist attack: What is Jaish al-Adl? What is its Pakistan connection?

Iran opens probe after ‘miscreants’ kill 10 policemen in restive southeast province

Terror outfit Jaish Al-Adl has claimed responsibility for simultaneous attacks on military posts in Southeastern Iran. At least three members of the security forces have been killed in the attack.

Clashes underway in Iran as terror troup Jaish Al-Adl targets again

Iran’s Revolutionary Guards (IRGC) have launched missile attacks on multiple “terrorist” targets in Syria and in Iraq’s Kurdistan region. The security council of the Kurdish regional government said in a statement that four civilians were killed and six injured in the strikes.

Iran launches missile strikes against targets in Syria and northern Iraq

Iran blamed Israel and the United States on Wednesday for twin bomb blasts that killed at least 95 people in the country's south, ripping through a crowd commemorating Revolutionary Guards general Qasem Soleimani four years after his death in a US strike.

ISIS claims responsibility for Iran twin blasts

Israel alerts embassies over Iran terror threat: Report