Trump: UK does have Muslim problem and should listen to Katie Hopkins
A spokesperson for Trump Towers was not immediately reachable for a comment, Reuters said.
It comes after Mr Trump sparked outcry with a series of comments after two Muslims, who the FBI said had been radicalised, killed 14 people in California.
His most contentious comments saw him call for an outright ban on Muslims entering the US. He also suggested police in London were scared for their lives because some areas of the city had become so “radicalised”.
Anonymous, a loose-knit international network of activist hackers, or "hacktivists," is famous for launching cyber attacks on groups such as the Islamic State following the attacks in Paris last month that killed 129 people.
