Pep Guardiola worried over fan trouble
A Swansea fan ran on to the pitch and accosted City’s Oleksandr Zinchenko during their dramatic 3-2 FA Cup quarter-final win on Saturday.
Two home fans are a Manchester City fan were arrested and held in police custody after the match according to Sky Sports.
Guardiola said: "It's happened a few times lately and it's a worry because in the future we could have problems.
"It's not nice but thankfully nothing happened this time."
A statement from South Wales Police match commander Superintendent Steve Jones, said: "The safety of supporters, players, officials and those who work these games is paramount.
"Those who invade the playing area are committing a criminal offence, will be dealt with robustly and could face lengthy bans from all football matches.
"We will continue to work with the football club to prevent and deter this unacceptable behaviour from a very small minority continuing."
This comes after two similar incidences were witnessed last week in the Premier League and the Championship.