The FA has launched an investigation after flares were let off during Liverpool's 3-1 win over Manchester City in the Community Shield on Saturday.
Goals from Trent Alexander-Arnold, Mohamed Salah and Darwin Nunez helped Liverpool win the season's curtain-raiser at Leicester's King Power Stadium, where red smoke covered the field of play at times.
The FA released a statement, saying: 'We are aware of incidents during the FA Community Shield where flares were used in the stands.
'The use of smoke bombs or pyrotechnics in a football stadium is dangerous, illegal and could have severe consequences,' the FA said in a statement.