Monday 15 April 2019 14:22, UK
Merseyside Police are investigating an incident which saw a flare thrown into the Chelsea section during Sunday's match against Liverpool.
Footage on social media showed red smoke coming from the visitors' section at Anfield after Sadio Mane put the Premier League leaders 1-0 up six minutes into the second half.
A young Chelsea fan needed first aid treatment after the flare, which is alleged to have come from the Anfield Road End's upper deck where home supporters are situated, landed in the middle of their section.
Social media also showed Chelsea fans attempting to remove the flare from their section towards the pitch.
A statement read: "Merseyside Police can confirm that we are investigating after a flare was reported to have been thrown during the Liverpool FC vs Chelsea FC match on April 14.
"The incident was reported to us at 5.40pm, shortly after LFC scored their first goal, that a flare was thrown from the upper section of the Anfield Stand.
"Following this, at around 6.20pm, officers received reports that a young Chelsea fan, believed to be nine years old, had been taken to the first aid centre where he was treated by St Johns Ambulance staff after suffering a panic attack as a result of the flare.
"At this stage, it is not clear who threw the flare, however investigations are ongoing and police are urging anyone with information to come forward quoting log 322 of 14th April."
Mohamed Salah went on to add a second goal soon after as Liverpool moved back to the top of the table just a couple of hours after being knocked off the summit by Manchester City.
Jurgen Klopp's side have a two-point lead over City but the reigning champions have a game in hand heading into the final month of the season.
Liverpool next take on relegation-threatened Cardiff City but first face a trip to Portugal where they defend a 2-0 Champions League quarter-final lead over Porto.