Cargo volumes through the Port of Los Angeles slid 7.2 percent in June compared with a year earlier, while the Port of Long Beach traffic remained basically flat.

About 650,000 containers moved through the L.A. port in June, according to figures released Friday. Imports dropped 7.2 percent compared to the same month last year. Exports decreased 15 percent in the same period. The transport of empty containers increased 1 percent year over year.

The port said the decline of traffic was in part due to vessel service that shifted out of the Port of Los Angeles.

Meanwhile, the Port of Long Beach reported late Monday that it had only a slight gain in June, despite an increase in vessel service. More than 565,000 containers moved through the port, up 1.8 percent from the same month last year. Imports increased 3.5 percent in the same period.