Phoenix ? The police agencies responsible for patrolling the Super Bowl say they’re not aware of any threat so far to the biggest single-day sporting event in the country, but they’ve organized a massive build up of security just in case.

FBI Special Agent John Lewis said Monday that authorities had heard only “what I would call fairly routine, very small incoming complaints about somebody wanting to do this or that.

“That’s very typical in these types of cases,” he said.

Nevertheless, with millions of people focused on the Super Bowl in Glendale, federal security officials have again designated the game a “level one” special event, just below President Bush’s State of the Union address.

This year’s Super Bowl festivities also will be complicated by another major sporting event, the FBR Open golf tournament, going on simultaneously in Scottsdale. Security agencies have been meeting for 15 months to ensure that they keep an organized watch over the entire metro area this week.