Family disputes.

From CNN:

Bibi recounted how she was awakened by a shriek as Ahmed put his hand to the mouth of his stepdaughter, Muqadas, and cut her throat with a machete. She said she looked on helplessly from the corner of the room as he then killed the three girls -- Bano, 8, Sumaira, 7, and Humaira, 4 -- pausing between the slayings to brandish the bloodstained knife at his wife, warning her not to intervene or raise alarm....

Speaking to AP from the back of a police pickup truck late Tuesday as he was moved to a prison in the city of Multan, Ahmed showed no contrition. Appearing disheveled but composed, he said he killed Muqadas because she had committed adultery, and his daughters because he didn't want them to do the same when they grew up....

Despite Ahmed's contention that Muqadas had committed adultery -- a claim made by her husband -- the rights commission reported that according to local people, Muqadas had fled her husband because he had abused her and forced her to work in a brick-making factory....

Activists accuse President Gen. Pervez Musharraf, a self-styled moderate Muslim, of reluctance to reform outdated Islamized laws that make it difficult to secure convictions in rape, acid attacks and other cases of violence against women. They say police are often reluctant to prosecute, regarding such crimes as family disputes.