LIVERPOOL -- Jurgen Klopp has again apologised for the "few idiots" who threw objects at Manchester City's team bus as it made its way towards Anfield ahead of Wednesday's Champions League tie.
UEFA has opened disciplinary proceedings against Liverpool for alleged acts of damage and crowd disturbances after City were unable to use their coach for the return journey because of the damage caused.
As City left Anfield following the 3-0 defeat, medical staff from the club treated an injured Liverpool supporter after she had been involved in a collision with a car.
"A perfect example for how it should be," Klopp told a news conference on Friday. "You cannot take things for granted.
"First of all, I have to say, again, apologies for what happened before the game. It's so strange.
"You go with your own bus through the crowd and it feels fantastic, it's great, it's support. You come in our garage and then the first thing I heard was that they smashed something on the bus of Man City. And it kills everything in that moment for us.
"You cannot be happy about that any more, you don't feel it any more.
"Another good example for that is you give people the opportunity to do something good [but] because of a few idiots it will maybe never happen again. That's how it is."
Klopp praised the City staff who treated the Liverpool supporter for "an outstanding gesture, outstanding thing to do."
He added: "It leaves us even more in a situation when you think: 'It was all strange'. The atmosphere during the game was one of the best I've experienced.
"But these things around, I changed my view. It's not OK. It's not like it should have been. Nothing else to say about this."
Liverpool issued a statement on Wednesday in which they vowed to "cooperate fully with the authorities to identify those responsible," adding that the behaviour of some fans had been "completely unacceptable."
Merseyside Police said two officers were injured by projectiles and have appealed for camera phone footage of City's arrival.