Liverpool’s Merseyside derby victory over rivals Everton was marred slightly as a number of missiles were thrown from the crowd onto the pitch.
Television showed Liverpool striker Luis Suarez collecting some objects as he prepared to take a corner early in the match at Anfield.
It is understood around a dozen coins were thrown from the Anfield Road End - part of which houses visiting supporters - during the first half.
Another object also appeared to be thrown towards the playing area as Liverpool captain Steven Gerrard celebrated scoring the first goal at that end.
No players were hit by any missiles.
Liverpool manager Brendan Rodgers said Suarez did not complain about any such issues.
Rodgers said: “He never mentioned nothing, no.”
Liverpool went on to win the Barclays Premier League game 4-0 with two further goals from Daniel Sturridge and one from Suarez.
Merseyside Police is looking into the matter.
The force said in a statement: “Merseyside Police can confirm it is investigating following reports of some missiles being thrown during the Liverpool v Everton football match this evening, Tuesday, 28 January.
“The incidents took place during the first half of the game when a number of coins and other small objects are believed to have been thrown from the stands onto the playing area.
“Officers are requesting CCTV from the stadium and will review any footage as part of inquiries to establish the full circumstances surrounding the incidents.
“Anyone with information is asked to call the police non-emergency 101 number or Crimestoppers, anonymously, on 0800 555 111.”