FIA president Jean Todt has ordered an inquiry into expletive-filled abuse that Ferrari driver Sebastian Vettel hurled at the Mexican Grand Prix race director, a Formula One governing body source said.
The German, furious over the driving of Red Bull's Max Verstappen, repeatedly swore at race director Charlie Whiting during the closing stages of Sunday's race.
"Jean Todt has requested a special report from the race stewards in regards to the radio conversation between Vettel and the race director," an FIA source told AFP.
The official said that a decision on further action would be taken once all the evidence is collected.
Media reports have said that Vettel, one of the best-paid drivers in Formula One, could face a grid penalty or even a race ban.
No indication has been given on when a decision will be made.
Four-time world champion Vettel was already penalised 10 seconds for blocking Red Bull's Daniel Ricciardo during the Grand Prix, dropping him from third to fifth in the final race standings.