<span style="color: #222222;">In Nigeria, more than 50 people are missing after a leaking oil pipeline exploded and caused a stampede.</span><br />'' <br />'' <span style="color: #222222;">The Nembe Chiefs Council spokesman, Nengi James-Eriworio, said that the blast early yesterday caused massive oil spillage in the Nembe kingdom in Bayelsa state in southern Nigeria. </span><br />'' <br />'' <span style="color: #222222;">The Nembe trunk line is operated by the Port Harcourt-based Aiteo Group and carries crude to the Bonny export terminal. </span><br />'' <br />'' <span style="color: #222222;">The pipeline is jointly owned by Agip, Oando and Shell Petroleum Development Company. </span><br />'' <br />'' <span style="color: #222222;">Nigerian oil companies usually assert that the majority of oil spills are caused by sabotage, theft and illegal refining.</span><br />''