Nigeria, west Africa\'s regional powerhouse, will deploy troops to Guinea-Bissau this week, Defence Minister Bello Haliru Mohammed said on Monday at a meeting of ECOWAS defence chiefs. \"I will like to announce to you that the pledges made by Nigeria for the Guinea-Bissau and Mali mission, we are committed to them and our troops are ready. In Guinea-Bissau, we will deploy before the 18th of this month,\" he said.