Police are investigating reports that a threatening banner was left near the home of former Liverpool boss Rafael Benitez, who is set to join Everton.
Benitez's arrival would be contentious as many Everton fans are opposed to the Spaniard, 61, after he once described them as a "small club" in 2007.
He would be the first manager to lead the neighbouring clubs since the 1890s.
A picture of the banner, which was posted online, said: "We know where you live. Don't sign."
A Merseyside Police statement said: "We can confirm police are investigating reports of a threatening banner at a location in Caldy today, Monday 28 June.