Unai Emery’s side secured all three points at Villa Park thanks to a brace from forward Donyell Malen, before Joel Monteiro snatched one back for the visitors in the 90th minute.
The game was marred by fan unrest throughout, however, including an incident that saw Malen get struck on the head by an object thrown from the crowd.
West Midlands Police have since confirmed that Two men were arrested on suspicion of affray and assaulting a police officer earlier this morning.
A further six Young Boys supporters detained on the same charge as they attempted to leave the country.
WMP Superintendent Paul Minor said: “We won’t tolerate violence of any kind at football matches.
“The majority of the crowd was in good spirit but unfortunately a small minority of away fans caused violence and disrupted the game.
“An investigation has been launched, and officers are reviewing body worn video and CCTV from the stadium of the disorder.”