7 April 2016. Islamic State fighters abducted 300 cement workers in a surprise attack within 30 miles from Damascus on Thursday. They were employed by the Al Badia Cement company, and were taken from near the town of Dumeir.

VICE NEWS

https://news.vice.com/article/islamic-state-just-kidnapped-300-cement-factory-workers

At industryabout.com:

Al Badia - Abu As Shamat Cement Plant

Syria - Industrial Facilities Map