With a couple of hours to go until the match between Napoli and Frankfurt, police and German supporters clashed.

Footage that spread showed supporters throwing gunshots at police who in turn countered with tear gas. A police car was also set on fire.

According to Italian media, the German supporters were whisked away from central Naples in buses around three hours before kick-off. Around the Stadio Maradona, the atmosphere was calm.

According to Eintracht Frankfurt board member Philipp Reschke, the unrest began when German supporters escorted away by police were attacked by a local group of about 150 people.

The Home Secretary condemns

"Tonight's violence must be condemned in the strongest terms. Perpetrators and troublemakers are ruining the sport," German Interior Minister Nancy Faeser tweeted.

Italian police banned German citizens from attending the match, but the decision was overturned shortly after by an Italian court. Instead, supporters of Eintracht Frankfurt were banned on the grounds that it was a so-called high-risk match.

The German club therefore made the decision not to sell any tickets for their sections – but despite the lack of a match ticket, just over 600 people chose to travel to Naples.

Napoli won the match and are now set for the quarter-finals of the tournament.