
The Islamic extremist group ISIS has reportedly blown up a nearly 2,000-year-old temple in the historic ruins of Palmyra, Syria. The temple is seen here on March 14, 2014, before the destruction.

Explosives are seen in the Temple of Baalshamin in one of the undated photos that were released Tuesday, August 25, on a social media site used by ISIS militants.

Militants are seen placing explosive devices in the temple, according to the original caption on the photo released by ISIS.

ISIS members say they rigged the temple with large quantities of explosives and detonated them.

UNESCO, the United Nations cultural organization, called the destruction of the Temple of Baalshamin a "war crime."

There was uncertainty -- not unusual amid the chaos of the Syrian conflict -- over when exactly the damage was done to the temple, which dates from the first century. See more photos from the ruins of Palmyra

