Metal detectors will be part of the security measures in place for the U.S. Open next week at Merion Golf Club.

The United States Golf Association announced its security procedures on Thursday.

"There will be metal-detection screening, similar to what you experience at airport security," said deputy chief John Viola of the Haverford Township Police Department, who is overseeing the law-enforcement operations. "This screening process is designed to prevent spectators from bringing prohibited items onto the championship grounds. Our goal is to assure that everyone has a safe and an enjoyable experience at the U.S. Open."

Among the items prohibited on the course are cell phones, PDAs and tablets, cameras, signs and bags larger than 8 inches square. Chairs, step stools and stepladders also are prohibited.

"We encourage all spectators to review the list of prohibited items and secure those items in a safe place or leave them at home," Viola said.