Manchester City's preparations for tonight's Champions League clash at Borussia Dortmund have been disrupted by fireworks.
Witnesses heard 'incredible bangs' which awoke residents and members of Pep Guardiola's travelling squad at the Radisson Blu in Dortmund.
A gang of 17 ultras set off the first batch of 'industrial strength' fireworks at 2.45am which sparked City's security staff to patrol the area.
Then at 4.30am around half a dozen of the group returned and set off a second explosion in a different area near the hotel, again waking up those inside.
Police were called to inspect the incidents, but it is claimed City's security were forced to foil a THIRD attempt at 5.30am.
The club's staff are said to have spotted members of the gang returning and managed to chase them away.
A source told the Daily Mail: "These were not just bangers. We are talking industrial strength fireworks.
"The bangs were incredible. It felt as if the hotel shook."
City meet BVB tonight in the second-leg of their Champions League quarterfinal defending a 2-1 lead.