KARACHI: A Pakistani mother has been arrested in Karachi after allegedly killing her two young children amid a dispute with her ex-husband, in a case that has shocked the country, police said on Thursday. Child killings by mothers are rare in Pakistan. Experts say such incidents are often linked to mental health crises, family breakdowns, or domestic stress, underscoring the limited psychiatric and social support available for women facing marital disputes in the conservative South Asian nation.