Follow CBSDFW.COM: Facebook | Twitter

DALLAS (AP) — Intruders got over the fencing that protects Texas’ two busiest airports more than authorities disclosed, though there were no breaches last year.

An Associated Press investigation shows 16 breaches of perimeter security at Dallas-Fort Worth International or George Bush Intercontinental since 2004.

The airports acknowledged 13 incidents when AP revealed problems with airport defenses last year.

Federal records showed three more breaches than DFW told AP about. Among them: A 2012 case in which a man squeezed through a perimeter gate and was stopped near a runway.

The airport did not explain the discrepancy.

Airports say their perimeters are strong and note no breach involved a known terrorist plot. Nationally, breaches are happening about every 10 days at one of the 31 major airports AP studied.

(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)