ROMULUS – An Associated Press investigation has found that people crashed cars into or otherwise breached the security fencing at Detroit Metropolitan Airport more than authorities have disclosed. In all, there were 14 intrusions from 2004 through mid-February.

Officials cited four incidents when AP revealed problems with airport defenses last year.

Federal records showed another five the airport had not told AP about. There also were four breaches in 2015 - the most in any year in Detroit - and one in February.

An airport spokeswoman said in the year after AP inquired, Detroit's records have been reorganized and more information is now available.

Nationally perimeter breaches happen on average every 10 days at one of the 31 major airports AP studied. That's a total of 345 breaches.