England's Football Association (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.
"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.
"We can confirm that we are investigating the matter and will be working with the relevant authorities, the clubs and the police to identify the individuals involved and we will take appropriate action.
"We expect the club to also investigate these incidents and to implement the new rules where applicable."
The FA, Premier League and Football League last week announced stricter sanctions for pitch invasions and the use of smoke bombs and pyrotechnics, and announced automatic club bans for the offences.
Abhishek Sharma's 19-ball fifty went in vain as world champions India were surprisingly beaten by Ireland for the first time in international cricket, slumping to a 34-run defeat in the first Twenty20 in Belfast on Friday.
England roared back into contention on the second day of the third and deciding test against New Zealand with Ben Duckett's rapid century helping his side to 223-2 after three wickets for returning captain Ben Stokes helped to dismiss the visitors for 438 at a sizzling Trent Bridge.
American great Serena Williams will face Australian 20-year-old Maya Joint in the first round of her eagerly awaited return to Wimbledon, a potentially tricky tie for the seven-time champion playing at the tournament for the first time since 2022.
Australia booked their spot in the knockout rounds of the World Cup on Thursday after a cagey draw against Paraguay, who are set to qualify as a third-placed finisher, while Turkey beat USA 3-2, scoring the winner with virtually the last kick of the match.