In Nigeria, the death toll from an attack last week by gunmen in Kaduna state has doubled to more than 130, the governor said.<br />''<br />''Kaduna state governor Nasir el-Rufai on Tuesday said that police are still investigating the gunmen's motive for the attack in Kajuru local government area, and there had been arrests. <br />''<br />''He added it appeared to have been a deliberate plan to wipe out certain communities.<br />''<br />''<span style="color: #222222;">The attack took place last Friday, the day before Nigeria was supposed to hold a presidential election, but electoral authorities delayed the vote by one week citing logistical challenges. </span><br />