A key game between Uruguay and Italy turned ugly after cameras caught Suárez appearing to bite an Italian player after he was blocked from the ball.
But the referee didn't see the alleged chomp, despite Italian defender Giorgia Chiellini falling down, clutching his shoulder, and pulling down his jersey to reveal a red mark.
After the game, Chiellini confirmed he had been bitten.
“... not sending off Suarez (was) ridiculous,” Chiellini said. “It was absolutely clear. There’s even a mark.”
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Uruguay went on to win the game 1-0, knocking Italy out of the tournament.
FIFA officials say an investigation has been launched to review the incident.
“We are awaiting the official match reports and will gather all the necessary elements in order to evaluate the matter,” said a FIFA spokesperson.
Suárez didn't respond to questions about his alleged bite, passing by reporters after the game with a smile and thumbs-up.
Soccer fans who watched the match were quick to respond with a series of memes poking fun at the incident, as well as the resurrection of Suárez's "vampire" past.
Here are some of the best:
@carleenfitzi Once you pop you can't stop #Suarez pic.twitter.com/bVziU07f2F
— Gaz_(initials) (@Gaz_FM) June 24, 2014We'll take our chances with the dusky shark. #Suarez #ITAvsURU pic.twitter.com/5ISVMo2ddq
— Ocean Conservancy (@OurOcean) June 24, 2014McDonalds Uruguay also joined in on the fun and suggested Suárez take a bite out of a Big Mac, not other players:
Hola @luis16suarez, si te quedaste con hambre vení a darle un mordisco a una BigMac ;)
— McDonald's Uruguay (@McDonalds_Uy) June 24, 2014Bud Light also followed suit:
Relax, they're twist off. #biting #ITAvsURU pic.twitter.com/Kj69El7MRE
— Bud Light (@budlight) June 24, 2014Snickers too:
Hey @luis16suarez. Next time you're hungry just grab a Snickers. #worldcup #luissuarez #EatASNICKERS pic.twitter.com/3RAO537HjW
— SNICKERS® (@SNICKERS) June 24, 2014The only solution.... Oh of course someone could actually give him a proper ban !!! #suarez pic.twitter.com/tgVXbnqzqw
— Moz Dee (@moz_dee) June 24, 2014Just when you thought it was safe to go back on the football pitch....
#URUvsITA
#Suarez pic.twitter.com/0cagY6A6Rh
— You Fecking Idiot (@YoufeckingIdiot) June 24, 2014Liverpool are already preparing for next season #Suarez pic.twitter.com/ELOEODayRk
— EPL Stat Man (@EPLStatman) June 24, 2014#lol #Suarez pic.twitter.com/dqAz0NFYNA
— Devang Desai (@DesaiDevang) June 24, 2014He's back ! #Suarez pic.twitter.com/k2M29dzLGF
— Rolando Hurtado Jr (@nandoincog) June 24, 2014Well, this seems appropriate... again. #Suarez #URU #WorldCup2014 #ITA #yyc pic.twitter.com/uDjdnxgyqb
— Mike Lumsden (@MLumsden770) June 24, 2014With files from The Canadian Press
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