Oktoberfest has opened in Munich after the ceremonial beer keg-tapping. Mayor Dieter Reiter officially started the 189th Oktoberfest at noon when he inserted the tap into the first keg.

Security has tightened at Oktoberfest after a deadly knife attack last month in western Germany, and officials are warning revelers

Munich Mayor Dieter Reiter opened Germany's feted Oktoberfest by tapping the first barrel of beer at noon on Saturday, officially kicking off the world's largest folk festival. Reiter, a Social Democrat,