Joe Biden said he was "shocked" by the shooting near Chicago that left at least 6 dead and 24 injured on Monday during a National Day parade, promising in a statement to "not give up the fight against the epidemic of gun violence.

• Read also: At least six dead and 24 injured after a shooting during a parade near Chicago

A man opened fire on the crowd that had gathered in the late morning to watch the July 4 parade in Highland Park, an affluent town north of Chicago, before fleeing. A large police force is now trying to locate the suspect.