In Zliten, Libya, a Sufi shrine and a historical library, containing years of religious and academic writing, were both destroyed, Al Jazeera reports.
Witnesses say that an armed group claiming to be Salafi carried out the assault on the Sufi shrine, which is the tomb of al-Asmar, a 15th century Muslim scholar. The library was burned, reducing its valuable contents to ash.
The Salafi are fundamentalist Muslims who believe that the religious practice of Sufism includes the worship of idols.
The military says that those responsible took advantage of sectarian fighting in the city. The government condemned the attacks, but witnesses report that security forces stood by and just let the destruction go ahead.