Federal agents arrested a La Mesa man after finding 48 guns and more than 200,000 rounds of ammunition at his house, the Bureau of Alcohol, Tobacco, Firearms and Explosives announced Tuesday.

David F. Morgan, 55, was arrested last week after ATF agents searched his home in the 4300 block of Avon Drive. Investigators said that Morgan used falsified information and a phony address to obtain a legitimate Arizona state identification card. They say he used the ID to purchase guns and ammunition in Arizona and then brought it across the state line to his home in La Mesa in violation of federal law.

"ATF will vigorously pursue any individual or group that illegally purchases and traffics firearms in violation of federal law," said John A. Torres, special agent in charge of ATF's Los Angeles Field Division, in a written statement. "This is a common scheme used by firearms traffickers, where they exploit less restrictive laws in neighboring states to purchase large numbers of firearms and then transport those firearms into California. We also see this same type of scenario employed by organizations trafficking firearms from the United States into Mexico," added Torres.

The agency did not say what led them to Morgan, but investigators said he had no known criminal record.