Border officers found more than $5 million of suspected cocaine hidden inside a trailer that attempted to cross from Mexico into Texas at the World Trade Bridge on Monday, according to a U.S. Customs and Border Protection press release issued Thursday.

After conducting a non-intrusive inspection of a 1996 International tractor hauling a lowboy trailer, officers at the Laredo checkpoint uncovered 280 packages of what they believe is 733 pounds of cocaine, worth an estimated $5.65 million in street value.

The bust is "significant" for a one-time apprehension of narcotics.

"Our CBP officers' knowledge of concealment methods and the technology they utilized on a daily basis played a key role in the discovery of these hard narcotics," Gregory Alvarez, Laredo Port of Entry director, said in a statement.

The powder was seized by officers and the case has been turned over to U.S. Immigration and Customs Enforcement's Homeland Security Investigations branch. CBP did not disclose the identity of the truck driver or what happened to the suspect following the bust.