Singh demanded that Mann be booked for rioting and assault and also referred for medical check up "to check his mental fitness for public appearances, lest he provokes and instigates more people to violence".
"These are the signs of utter frustration on part of the AAP leaders like Mann, who seem to have lost their mind over the developments that have taken in their party", he said.
"Such behaviour must not be let go unchecked and unexamined lest it leads to serious law and order problem," he said, adding, Mann not only needs medical and mental treatment, but legal action as well.
Speaking on the sacking of Dalit minister Sandeep Kumar by AAP, Singh called the move "deliberate", claiming it was a way "to divert the public attention from the ongoing crisis in Punjab".
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"Kejriwal had known about the existence of the CD long before he appointed Kumar as a minister. At that time Kejriwal overlooked it and appointed him as a minister and now he used the same CD against him to divert public attention from the Punjab crisis," he claimed.
"Bir was among the 21 party leaders who sought sacking of Chhotepur. How can a complainant sit on the judgement over someone against whom he has complained?" he asked.
Singh lashed out at Chief Minister Parkash Singh Badal for "lying" about his role in approving the construction of SYL in Punjab in 1978, saying he was a "congenital liar".
"It is very much part of history and record that he signed the file. Badal is a congenital liar and he was trying to hide his faults with his lies," he said.