11.   Members of the two sects had a falling out over which branch of the Sunni faith should be taught at the religious school run by the Benuri mosque.

12.   Shiite Muslims are a minority in Pakistan, where most people of the two sects get along.

13.   Since then relations between rival members of the two sects has been tense and police officers have been put on alert throughout the country.

14.   Sunni Muslims have disrupted these processions in the past, often resulting in violent clashes between the two sects.

15.   The two sects have lived in peace in the past, though Sunnis look upon the Alawites as heretics.

16.   The two sects have lived in peace in the past, though Sunnis look upon the minority Alawites as heretics.

17.   The two sects differed over who was to lead the Muslim faithful following the death of the prophet Mohammed.

18.   The two sects split shortly after the death of the Prophet Mohammed in a dispute over his successor as leader of the faith.

19.   Violence is restricted mostly to small but heavily armed extremist groups of the two sects.

20.   While the two sects generally get along in Pakistan, militant groups, led by armed thugs, have emerged in recent years.