MINNEAPOLIS (AP) - Long waits at security checkpoints have become the new normal at Minneapolis-St. Paul International Airport.

And officials say there's no relief in sight as the busy spring break and summer travel seasons approach.

The situation has become so frustrating that Jeffrey Hamiel, executive director of Metropolitan Airports Commission, complained to the head of the Transportation Security Administration this week. He pointed out that passenger volume at the airport has increased 10.5 percent since 2011, while the number of screeners nationally has fallen around 15 percent over that period.

Hamiel told TSA Administrator Peter Neffenger in a letter Thursday those diverging trend lines "are a recipe for unacceptable customer service" and that MSP has reached that point.

TSA officials say they're doing the best they can with the resources they have.