“In a post released on Sunday, ISIS supporters took aim at Twitter and the social network’s co-founder Jack Dorsey for blocking their accounts online. Accompanying the post is a doctored image of Dorsey in a gun’s crosshairs. While the provenance of the post is unclear, Twitter and law enforcement have already begun an investigation into its origin.”

Source: ISIS supporters send death threats to Twitter staff, co-founder Jack Dorsey | The Verge