Police are investigating reports that West Ham striker Andy Carroll was threatened at gunpoint on his way home from training on 2 November.
The Daily Mail claims Carroll, 27, was confronted by two motorcyclists while he was driving home to Essex.
The England international evaded the motorcyclists, one of whom brandished a firearm, and reportedly drove back to West Ham's training ground at Rush Green in a state of panic following the incident, striking several vehicles en route.
The club staff made a call to police at 12.45pm GMT.
"West Ham United can confirm an incident targeting one of our players on Wednesday 2 November. The matter is now being handled by the police," the Daily Mail quoted a club statement as saying.
Sources told the paper that Carroll was "shaken and stunned" by the incident.
The former Liverpool and Newcastle United striker has been sidelined since August with a knee injury and has only made one league appearance for the Hammers this season.
A police statement read: "The two men threatened the driver. The motorcyclists attempted to block the car as the driver sought to get away.
"The suspects rode off prior to the arrival of police. There has been no arrest."
Carroll has won nine caps for England since making his debut in 2010, scoring two goals.