Published Tuesday, 24 June 2014
Suarez, who served a 10-match ban for biting Chelsea defender Branislav Ivanovic in 2013, clashed with Italian defender Giorgio Chiellini in the 79th minute in Natal.
Both players fell to the floor after an off-the-ball clash in the Italian box.
Television replays showed Suarez moving his head towards Chiellini who responded by swinging an arm, before chasing the referee to apparently insist he had been bitten on his shoulder.
Two minutes later defender Diego Godin rose highest to nudge home a corner to end the hopes of the Italians, who had played with 10 men since Claudio Marchisio's sending-off on the hour.
Suarez could face suspension if FIFA disciplinary officials uphold Chiellini's protests, which will be the subject of further investigation.
The incident cast a shadow over a hard-fought victory for the South Americans, who needed to win in order to progress along with Costa Rica in Group D.
In a statement, FIFA Vice-President Jim Boyce said he had seen the incident involving Suarez several times on television.
"There is no doubt Luis Suarez is a fantastic footballer, but once again his actions have left him open to severe criticism," he added.
"There is no doubt that FIFA must investigate this incident very seriously and take whatever action is deemed necessary."
A FIFA spokesperson said: "We are awaiting the official match reports and will gather all the necessary elements in order to evaluate the matter."
Meanwhile Italy coach Cesare Prandelli has tendered his resignation in the wake of the country's elimination from the tournament.
© UTV News