Nigeria's secret service said on Tuesday it had intercepted 13 containers of weapons from Iran in what Israeli defense sources believe may be part of a new smuggling route from Iran to Hamas in Gaza. Rocket launchers, grenades and other explosives camouflaged as building material were seized in the Nigerian port of Lagos after being unloaded from an Iranian ship. Nigerian media reports said the ship, which came from Iran, docked in Lagos port for a few hours only, unloaded 13 containers and sailed on.