The workers alleged that Soni has been falsely implicated in a case and was arrested under political pressure.
The protesters, led by party state unit vice-president and Doaba zone in-charge Tarlochan Singh Soondh, staged a 'dharna' demanding suspension of Rawalpindi SHO Joginderpal.
The SHO, however, refuted the charge.
The Congress activists also presented a memorandum to additional commissioner SK Singla.
In a memorandum addressed to the Punjab Governor, the Congress demanded that President's rule be imposed in the state as "state machinery has collapsed and political adversaries of SAD-BJP alliance, especially Congress activists, are being victimised".
A group clash took place two years ago at Rawalpindi and Soni's name was mentioned out of "political vendetta" even though he was not present there at that time, they said.
