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Opponents to a proposed Muslim cultural center near the World Trade Center site in New York city have marched to Ground Zero.
Hundreds of protesters carried signs Sunday with slogans that read "No Mosque Here" and "No Sharia Here." They sang patriotic songs and waved flags and photos of violent attacks by Islamic extremists.
Earlier in the day, supporters of the cultural center, which is to include a prayer room, rallied just a few blocks away.
A heavy police presence kept the two groups apart. President Barack Obama has said he supports the right of Muslims to build the center near the site of the September 11 attacks.
Republicans oppose it and are using the issue to attack the President.