All the three accused - Bhola, Bittu and Chahal – and Bittu's father Master Partap Singh have been interrogated and their statements recorded by the ED.
Chahal and Bittu's father, in their statements, had alleged that the Minister knew Canada-based drug dealers Satpreet Satta and Parbinder Singh alias Pindi, sources had said earlier.
Chahal, in his statement, has said that Satta was provided two gunmen and a chauffeur-driven car by Majithia during his stay in India.
He has also corroborated Bhola's statement that Satta and Pindi were present at Majithia's marriage, ED sources had said.
Chahal owns pharma companies which were allegedly manufacturing precursor chemicals — ephedrine and pseudoephedrine — that were being diverted illegally for the production of synthetic drug ICE.
Reacting to the summons which were issued recently, main opposition Congress had sought Majithia's resignation.
Punjab Congress chief Partap Singh Bajwa had sought Majithia's resignation and reminded him that earlier then Jails Minister Sarwan Singh Phillaur had resigned in the same case when the name of his son had surfaced.
Meanwhile, activists of ABVP, youth wing of the BJP, held a protest demonstration near the ED office here.
They raised slogans and demanded that Majithia should tender his resignation as Punjab Minister.