PATNA: School teacher recruitment examinations began on Thursday at 870 centres across Bihar, amid tight security, officials said. The tests are being conducted by the Bihar Public Service Commission (BPSC) and will continue till Saturday. More than 8 lakh aspirants have applied for the recruitment of 1,70,461 school teachers in the state. Proper arrangements have been made to ensure seamless execution of tests at 870 examination centres across the state. The exams would be conducted in two shifts, with primary teacher recruitment tests and compulsory paper assessments scheduled for Thursday and Friday.