A post on a jihadist website encourages attacks against foreign teachers . The Islamic State has claimed responsibility for the attack in which at least 30 people were killed and more than 100 wounded. A U.S. Embassy suggests avoiding crowds and keeping a low profile in public .
A post on a jihadist website encourages attacks against foreign teachers . Embassies say they are not aware of any specific , credible threat . A U.S. Embassy suggests avoiding crowds and keeping a low profile in public .