MUNICH (AP) — Security has tightened at Oktoberfest after a deadly knife attack last month in western Germany, and officials are warning revelers to expect longer lines to enter as metal detectors are deployed for the first time in the Bavarian beer festival’s 189-year history.

Authorities say there are no specific threats to the world's largest folk festival, which begins Saturday with the and runs through Oct. 6. Some 6 million participants, many wearing , are expected over the course of the event.

The ɫtv Press. All rights reserved.