The ICC International Maritime Bureau's Piracy Reporting Centre recommends extreme vigilance aboard ships in West African waters. Since mid-August three vessels have been hijacked by pirates in this region. These recent attacks are notable as they have all been against tankers, with the purpose of stealing the valuable cargoes on board. Furthermore, the incidents reported off West Africa are characterised by the degree of violence used against crew. On 18 August 2012, a tanker was hijacked whilst at anchorage off Lome. Another tanker was attacked nearby on 28 August 2012. On 5 September 2012, a tanker was boarded whilst at anchorage off Lagos.