LISBON (Reuters) - Angola's navy said on Sunday the crew of an oil tanker that vanished off its coast on January 18 had turned off communications to fake an attack, seeking to calm energy sector fears that the vessel had been hijacked by pirates.
Unconfirmed reports that the tanker had been seized raised concern that piracy off West Africa was spreading south from the Gulf of Guinea, near Africa's biggest oil producer Nigeria, where most hijacking gangs are believed to originate.
