Rooney has made a huge impact this season

The 17-year-old England forward was reported to have spat on the pitch in front of visiting fans in the Lower Bullens Road stand during the second half.

The match, which Everton lost 2-1, was an ill-tempered affair with Goodison pair David Weir and Gary Naysmith sent off late on.

Match report: Everton 1-2 Liverpool

A police spokeswoman said: "Merseyside police are aware of an incident involving Wayne Rooney at the local derby match.

"Sufficient people came forward to report the incident and there is no further requirement for witnesses.

"We will be following up inquiries as soon as possible and will be liaising with the clubs."

Everton's head of corporate affairs and public relations Ian Ross said: "We will speak with Merseyside Police within the next 24 hours."

The Football Association is waiting for the official match report before making any comment on any alleged incidents during the game.

The Everton manager, David Moyes, also refused to comment.