You can start with this website http://nigeria.usembassy.gov/ A letter of invitation is usually advised. They may also need to show strong ties to their country, such as family, a job, home, a bank account.
Quick Answer. Over one billion Muslims live in Asia, which makes it the continent with the highest Muslim population. Indonesia is the country with the largest Muslim population, with 209 million people. Continue Reading.
The study, by the Pew Research Center's Forum on Religion & Public Life, is based on census data from more than 200 countries. Almost 62% of the world's Muslim population live in the Asia/Pacific region, compared with only 20% in the Middle East and North Africa (the historical cradle of Islam). More than 300m Muslims â one-fifth of the total â live in countries where Islam is not the majority religion.