Police in Braunschweig, northern Germany, cancelled a local parade shortly before it was set to begin on Sunday, amid concerns it could be targeted by terrorists.
The carnival parade was called off because police had received information from "reliable sources" of a plot by someone with an Islamist background, Braunschweig authorities said in a Facebook post.
The city's mayor, Ulrich Markurth, was involved in the decision to cancel the parade, just 90 minutes before it was set to begin.
"This is a very sad day for our city and all the people who were so looking forward to the parade like me," Markurth said in a statement on Facebook. "It is also a sad day for our democratic society."
It comes after two people were killed in twin terror attacks by a gunman in the Danish capital, Copenhagen, on Saturday.
"The police have made it clear that the risk is very, very serious," Mayor Markurth told Germany's NDR television.
The annual parade reportedly draws more than 250,000 visitors each year, according to the BBC.
