Rangareddy: Tension escalated at a government high school in Rajendranagar after some unidentified persons performed black magic rituals on the premises of the school. The bizarre incident took place at the Zilla Parishad High School in Hyder Shah Kote, Rajendranagar. According to the sources, a few students in the morning found some turmeric, lemons and toys before the science lab and store room. Feared after the incident, they informed the school teachers and they rushed to the school and found some black magic rituals on the premises of the school. After receiving the information, the police reached the spot and checked the CCTV footage but nothing was found in it as the miscreants damaged them. The police registered a case and an investigation is underway.