Police have questioned PKR Youth secretary Ahmad Syukri Che Ab Razab over the fighting at the wing's congress on Friday.
Syukri said he was questioned over the "riot" at the Malacca police headquarters in Bukit Beruang from 2pm to 4pm.
The PKR Youth congress saw several rounds of fighting.
The initial fighting was after several PKR members, including former PKR Youth permanent chairperson Mizan Adli Mohd Noor, were barred from entering the hall where the meeting was being held.
In his press statement, he said that some of the scuffles were because some PKR members failed to comply with a dress code, requiring them to wear baju melayu to the meeting.
However, Malaysiakini had observed that day that groups of youths in black t-shirts were let into the hall as observers.
Dissatisfaction with the black-clad youths is believed to be the cause of the most intense round of fighting at noon on Friday.
The brawl, which spilt out of the Malacca International Trade Centre resulted in at least two people being injured after stones were allegedly thrown.
Several of the youths in black had told Malaysiakini they were promised payment for attending the congress.
When contacted, Syukri said police did not question him about the black-clad youths.
He said police were not interested in the political aspects behind the incident.
Meanwhile, in his statement, Syukri said he and a few others had also lodged a police report over a chat screenshot involving a PKR leader, which allegedly showed an attempt to hire "certain groups to provoke trouble at the congress".
While he mentioned no names, this is believed to be a clear reference to PKR Youth deputy chief Hilman Idham.
A screenshot had alleged that Hilman had wanted to hire some 30 people as security for the PKR Youth congress.
The PKR Youth deputy chief denied this, saying he was not an organiser and thus, had no need to appoint security.
"What do I want to hire the security team for? We are the government of the day. We could get assistance from Rela or police to help," he told Malaysiakini.
Additional reporting by Annabelle Lee