Both have been released after police found nothing against them, he said.
A senior police officer said two people were detained for a few hours after they tried to misbehave with the Chief Minister during a function but denied that they were mentally tortured and harassed.
Soon after they questioned Mr Kumar, they were detained by the special branch of Bihar police and were subsequently questioned, a close relative of Nimi Kumar said.
A family member of Suresh Kumar, on condition of anonymity, said their "crime was that they dared to put genuine questions before the Chief Minister in connection with entrepreneurship. It has sent a negative message about Bihar police," he said.