The 1994 Imam Reza shrine bomb explosion in Iran leaves at least 25 dead and 70 to 300 injured.

The Imam Reza shrine bombing refers to a bomb explosion that occurred on 20 June 1994 in a crowded prayer hall at the shrine of Ali al-Ridha, the eighth Imam of Shia, located in Mashhad, Iran. To maximize the number of casualties, the explosion took place on Ashura, one of the holiest days for Shia Muslims, when hundreds of pilgrims had gathered to commemorate the death of their third Imam, Husayn ibn Ali.

Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the northeast, Afghanistan to the east, Pakistan to the southeast, and the Gulf of Oman and the Persian Gulf to the south. Iran ranks 17th globally in both geographic size and population and is the sixth-largest country in Asia. Iran is divided into five regions with 31 provinces. Tehran is the nation's capital, largest city, and financial center.