Complex sentence: Mansour frequently traveled between Cairo and Alexandria by train because he felt safer in the latter than Cairo because it had fewer police officers, and the Vice Department of Borg El-Arab police station in Alexandria started keeping a profile on him during this time.
Split into simpler sentences: Mansour frequently traveled between Cairo and Alexandria by train because he felt safer in the latter than Cairo because it had fewer police officers. The Vice Department of Borg El-Arab police station in Alexandria started keeping a profile on him during this time.