Federal authorities are urging law enforcement agencies across the country to watch out for signs that extremists might be planning to wreak havoc at the upcoming political conventions — by blocking roads, shutting down transit systems and even employing what were described as acid-filled eggs.
The warning came in a joint FBI-Department of Homeland Security bulletin issued Wednesday.
The bulletin specifically warned about a group of anarchists from New York City who could be planning to travel to the convention sites to disrupt the events by blockading bridges.
