An explosion rocked the central Nigerian city of Jos on Saturday, the country's main relief agency said, just days after at least 118 people were killed in a twin car bomb attack. "There has been an explosion in Jos," Manzo Ezekiel, spokesman for the National Emergency Management Agency (NEMA), told AFP but said it was not clear what caused the blast nor if there were casualties. Pam Ayuba, spokesman for the Plateau state governor Jonah Jang, said the blast happened on Bauchi Road at about 9:30 pm (2030 GMT). Other reports said it targeted football fans watching the European Champions League final between Real Madrid and Atletico Madrid.