Sokoto, headquarters of Islam in Nigeria, two years ago witnessed bloody clashes between the Sunni and Shiite sects over the right to worship at the central mosque.

• 索科托是尼日利亚的伊斯兰教总部。两年前什叶派穆斯林和逊尼派穆斯林因为进入中央清真寺的礼拜权问题而发生流血冲突。