The world's most-wanted drug lord was captured in a raid by Mexican Marines.

The Mexican Navy says Joaquin "El Chapo" Guzman was taken into custody Friday along with six other people after a raid and shootout in the seaside town of Los Mochis.

Guzman had been on the run since he escaped from a maximum security prison in July last year.

He has now been returned to that same prison.

Two armored vehicles and a cache of weapons were seized in the raid, including a loaded rocket-propelled grenade launcher.

Five other suspects were killed and six others were arrested.