The Islamic State (IS) militant group has destroyed part of what’s considered the most important temple at the ancient Syrian site of Palmyra, activists and witnesses say, the BBC reports.

The extent of the damage to the 2,000-year-old Temple of Bel is not clear but local residents have described being shaken by a large explosion.

The reports come a week after IS blew up another temple at the ancient city.

The militants seized control of Palmyra in May, sparking fears for the site.

The world-famous Greco-Roman ruins are in the desert north-east of the Syrian capital, Damascus.