A spokesman for the New York City company that manages 1 World Trade Center says the building's head of security has resigned.

The Durst Organization's Jordan Barowitz confirms David Velazquez resigned Friday. The departure comes just days after the arrests of three skydiving enthusiasts who in September parachuted off the building, the nation's tallest skyscraper. It comes about two weeks after authorities say a New Jersey teenager sneaked onto the site and climbed to the top of the 1,776-foot tower to take pictures.

Barowitz says the company took over security of the tower in January. The Port Authority of New York and New Jersey controls the site and is responsible for security around the perimeter.

Velazquez can't be reached for comment by telephone.