Gunman kills six at parade in US; suspect arrested

The United States was caught up in bloodshed again on Monday, when the latest in a series of mass shootings clouded the nation's Fourth of July observance.

A gunman on a rooftop killed at least six people and wounded more than 25 after opening fire on a holiday parade in the state of Illinois.

The shooting occurred around 10:15 am, more than halfway through the parade in downtown Highland Park, which is about 40 kilometers north of Chicago, said authorities.