US homeland security chief warns of lone terror attacks at election poll sites

Alejandro Mayorkas says radicalized individuals could disrupt voting by targeting polling places and workers

The secretary of the Department of Homeland Security, Alejandro Mayorkas, has warned that one of the top threats facing the US in the lead-up to November's presidential election are lone offenders" aiming to disrupt voting and other public targets.

In the aftermath of 9/11 the most prominent terrorism-related threat facing our nation was that of sophisticated foreign terrorist networks," Mayorkas said in a keynote speech at a closed-door conference, hosted by the Soufan Center in New York.