Ugly scenes marred West Ham's 2-0 win over Rapid Vienna in the Europa League on Thursday after crowd trouble broke out between rival fans.
The first incident during the game broke out in the visiting supporters' end after Declan Rice put the Hammers in front at the London Stadium in the first half.
Some away fans tried to storm the home section after the goal, jumping the barriers before being forced back by stewards with the help of the police.
Both sets of supporters were seen lobbing objects at each other, including a giant bottled water cooler.
West Ham defender Aaron Cresswell also had a few objects thrown at him when he took a corner late in the first half.
The trouble began before the match when the away fans antagonised the West Ham supporters and threw bottles at the home section right before a light show at the London Stadium ahead of kick off.
The trouble then cranked up after Rice gave West Ham the lead and the home fans began taunting their Austrian visitors, who threw more bottles in response.
There were more outbreaks of violence at full-time and riot police were called in to bring an end to the melee.
West Ham coach David Moyes said he had seen some of the trouble from pitchside while urging fans to control themselves and protect the club's reputation on the continent.
'I was aware of some things being thrown,' Moyes said.
'We want to be a club regularly in Europe and because of that we want to behave correctly.
'I don't know who started it but we don't want that reputation, we want to be seen as a club who can travel to Europe and everybody welcomes us.'
Crowd trouble was a common occurrence when West Ham moved to the London Stadium in 2016, with violence breaking out in Premier League matches against Watford and Middlesbrough.
Things came to a head in a League Cup win over Chelsea that same year, when the opposing fans pelted each other with coins and seats were ripped out of the stadium.
