Abu Sa'id Khudri reported Allah's Messenger having said: There is a group of jinns in Medina who accepted Islam, so he who would see anything from these occupants should warn him three times;
and if he appears after that, he should kill him for he is a satan.

وَحَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنِ ابْنِ عَجْلاَنَ، حَدَّثَنِي صَيْفِيٌّ، عَنْ أَبِي السَّائِبِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ سَمِعْتُهُ قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " إِنَّ بِالْمَدِينَةِ نَفَرًا مِنَ الْجِنِّ قَدْ أَسْلَمُوا فَمَنْ رَأَى شَيْئًا مِنْ هَذِهِ الْعَوَامِرِ فَلْيُؤْذِنْهُ ثَلاَثًا فَإِنْ بَدَا لَهُ بَعْدُ فَلْيَقْتُلْهُ فَإِنَّهُ شَيْطَانٌ " .