Major Stephen Udice is leading the police operation at the Ryder Cup
The recent killing of American conservative activist Charlie Kirk has increased the risk of the Ryder Cup being targeted by someone wanting to "make a statement", according to the man leading security at the event.
US President Donald Trump will visit the Bethpage Black course, a short distance outside New York, once the competition gets under way on Friday.
Fifty thousand spectators will also descend on the course in Long Island for each of the three days of action.
Kirk was shot dead in Utah on 10 September, and a vast, multi-agency security operation is being implemented for the showpiece golf contest between teams representing Europe and the United States.
