"Rakesh, a close aide of Dera chief has been arrested from Sirsa," a senior police official said.
He added that Rakesh's arrest could help the police get clues about the whereabouts of Ram Rahim Singh's absconding adopted daughter Honeypreet and another key Dera functionary Aditya Insan.
Both are wanted in connection with the violence that broke out in Panchkula on August 25 after Ram Rahim Singh was convicted in a rape case.
The police said that another person was also arrested in connection with the violence. "Rohtash has been arrested from Panchkula," Haryana DCP Manbir Singh said.
He was allegedly involved in inciting violence and arson, the DCP said.
The Haryana Police has arrested over 1000 people in connection with the violence in Panchkula, which left 35 dead. The violence had broken out after Ram Rahim Singh was held guilty by a special CBI court. Six persons had died in incidents of violence in Sirsa.
The Dera head is serving a 20 years jail sentence for raping two disciples.
The Haryana Police also said today that it was probing the authenticity of some "threat letters" sent to a section of the media.
The assurance came after a delegation of journalists met Haryana ADGP (law and order) Mohd Akil in Chandigarh today.
The letter named some TV channels claiming that they had defamed their "Guru".
Mr Rana said that they also met Punjab Police intelligence wing chief Dinkar Gupta and brought the matter to his notice.
"In our meeting with ADGP Akil, we told them that some media houses had received a hand written letter allegedly written by the so-called Qurbani gang threatening to eliminate journalists and harming their families, for showing content against the Dera chief after he was convicted," he said.
Mr Rana said that both Mr Akil and Mr Gupta assured that they will examine the matter.
"We have launched investigations into the matter. We will investigate whether anything like the Qurbani gang exists or not. And if it exists, then what they do," ADGP Akil said.
So far there is no intelligence input that journalists covering the Dera Sacha Sauda related events can be physically harmed, he said.
Mr Akil, however, added that they will analyse the threat perception and accordingly decide on providing security to those who may need it.