Canada looks to stem illegal migration from Nigeria

Canada is trying to curb the number of asylum seekers from Nigeria who are flooding into Canada via the United States, officials said Monday.About 2,500 migrants, mostly Nigerian nationals, entered Canada illegally in April, bringing the total so far this year to more than 7,300.At Ottawa's request, US authorities have also recently tightened their visa rules for Nigerians to try to prevent tourists from flying to the US and then hopping across the border to file Canadian refugee claims.