The African Land Forces Summit brings together "land force chiefs from across Africa for candid dialogue" to improve security, said the US Army in an April 10 statement.
Police also fire tear gas, live bullets to disperse hundreds of protesters demanding release of leader of Shia organization
Nnamdi Azikiwe International Airport in Abuja closes completely for runway repairs on March 8. Domestic and international flights will be diverted to Kaduna, 170 kilometres (105 miles) away.
The blast occurred near the site of a car bombing that killed 75 people last month in Abuja.