Former police officer Gurmeet Pinky was also present during the meeting, police said.
Sandhu had gone to the Patiala jail to interview Rajoana who turned angry over some issue and thrashed the journalist, police said.
DIG (Jails) Lakhminder Singh has confirmed the incident and said the meeting was inappropriate and Assistance Jail Superintendent Jagmel Singh who had arranged the meeting was suspended after the incident.
Punjab Jail Minister Sohan Singh Thandal said an inquiry has been ordered into how the unauthorised entry and interview was managed.
Also Read
"Once the report is submitted strict action against will be taken against the guilty jail officials," he said.
Meanwhile, Sandhu in a post on his Facebook page claimed that last week, after the videos, 'Confessions of a Punjab Police Cop', were uploaded on Youtube, he was approached by Rajoana's sister, Kamaldeep Kaur, who told him that he should have taken the convict's version of the issues.
"She said that I should meet Rajoana for the version and offered to arrange the meeting in jail. The meeting was fixed by her for today. She insisted that I ask Gurmeet Singh Pinky to come so that he could be face to face with Rajoana. I asked Pinky, if he could. He said, fine," the post said.
"I was ushered into the jail and when I met Rajoana, her husband was also sitting there. Pinky was not with me. When I met Rajoana and the other gentleman, an argument ensued and when I noticed that Rajoana and the other person were getting violent, I tried to move away. The jail officials intervened and lest the situation gets out of hand, I moved out of the jail.
"Rajoana's sister has posted a comment on her facebook page. I posted my own comments there but these were removed. In this post, she has accused me of yellow journalism at the behest of the government. I will not join issue with her as she claims to be an honourable person. I would only say that on my journalism, I would want my work to speak for itself," the post said.