Welcoming Malik in the party, Delhi Congress chief Ajay Maken said many other BJP and AAP leaders were in touch with him to switch over allegiance.
"We are getting hints from some other leaders from BJP and AAP. We will allow them to join Congress after giving due thought to their competence and local influence," Maken said.
It is a "homecoming" of sort for Malik who had left Congress and joined AAP to contest MCD by-polls from Nanakpura ward in South Delhi Municipal Corporation last year.
He charged that not even a "single" meeting of five AAP councillors, who won by-polls, was held to train them about fighting "corruption" in MCD.
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He also alleged there were no directions from the party leadership as to how to serve the people better.
Incidentally, Malik had won the Nanakpura ward with smallest margin among the 13 wards for which byelections were held. He had defeated BJP's Nitin Sharma by 522 votes.
Maken said that Malik joined Congress without imposing any condition for returning to party fold.
Congress has decided to give party tickets for ward elections based on the feedback of party workers.
"The rules are same for everyone and the process of ticket distribution will be the same for all," he said.
The Delhi Congress chief also said the party gives serious consideration to "corruption" issue and those facing charges of misconduct will not be given ticket.
He also rejected the view that delimitation of wards have put some parties in a position of advantage.
The civic body polls for 272 wards of three municipal corporations in Delhi are likely to be held in April. BJP had been ruling all the three civic bodies for 10 years.