The United States has issued a global travel warning after recent terror attacks in France, Australia and Canada.

The alert comes hours after French police killed three hostage-takers in a pair of incidents. Two of the men are believed responsible for Wednesday�s attack on a satirical magazine in Paris. Twelve people were killed in that assault, France�s deadliest terror incident in decades.

The State Department�s warning says attacks against Americans are becoming increasingly prevalent. It also cites an increased risk of reprisals against U.S. and Western targets for the U.S.-led intervention against Islamic State militants in Syria and Iraq.

The warning also cited last month�s hostage standoff at a Sydney cafe and the October killing of a soldier near Canada�s parliament.

(AP)