While questioning the motive behind the raids, Mr Sinha disapproved of Mr Kejriwal's language to attack Prime Minister Narendra Modi.
Senior BJP lawmaker Shatrughan Sinha, who has often taken a position at variance with the party's stand, today raised questions over the timing of the Delhi Secretariat CBI raid.
Mr Sinha wondered who "advised" for the searches at the office of Delhi Chief Minister Arvind Kejriwal's principal secretary.
While questioning the motive behind the raids, Mr Sinha disapproved of Mr Kejriwal's language to attack Prime Minister Narendra Modi who was called a "psychopath" and "coward" following yesterday's raid.
The Central Bureau of Investigation raid and searches kicked up a political firestorm amid charges and counter-charges.
"In politics, timing is everything. This was definitely not the right time for the raid. Hope wish &pray that this does not boomerang on us," the actor-turned politician said in a series of tweets.
Mr Sinha also wondered who gave the advise for the CBI raid at the office of Principal Secretary Rajendra Kumar.
"Wonder who advised for the strike, that too while Parliament was in session. After all, CM(Kejriwal) is not only very popular but masses' favorite too," he said.
"Good sense must prevail upon those who have brought embarrassment to our people and our leadership...that too at this juncture," he added.
In another tweet, Mr Sinha said, "Don't approve of avoidable language of Delhi CM about our dashing dynamic action hero PM. But need to look within. How why & who started it?"
BJP leaders yesterday condemned the language used by Mr Kejriwal yesterday to target PM Modi and demanded an apology from Delhi Chief Minister.