Sayyiduna Abu Umamah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "In the last times there will be police forces who go out in the morning in the wrath of Allah and return in the evening in the displeasure of Allah. So beware lest you be among their close associates."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7585