"The SIT has been constituted. It will be headed by DSP Rohtak, Amit Bhatia and also consists of incharge of CIA-2 unit (of Rohtak police) Inspector Vijay and incharge of Rohtak STF (Special Task Force) Sub Inspector Rakesh," Rohtak SP, Shashank Anand said.
He further said that Rohtak police has "officially informed CBSE also (about the development)."
Rohtak Range IG Shrikant Jadhav said that efforts are on to arrest key accused in the case, Roop Singh Dangi.
"Many things would become clear once he is caught," the IG said.
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Not ruling out the possibility of arrested persons having links with similar crime operating in other states, he said the accused were being questioned and more facts will come to light in the course of time.
During investigations, it came to light that the accused were working in collusion with Rohtak-based Roop Singh Dangi who had provided them with "answer keys". Dangi is on the run, police said.
Police are probing at least nine candidates with whom a deal between Rs 15-20 lakh was struck by the accused to help them pass the examination.