Mohun Bagan filed an official complaint against East Bengal head coach Khalid Jamil after Sunday's Kolkata derby in the I-League at the Yuba Bharati Krirangan (YBK).
The Green and Maroon brigade were peeved at Khalid Jamil's alleged misbehaviour towards a Mohun Bagan staff.
As per Bagan, Khalid Jamil arrived at the stadium five hours prior to the scheduled kick-off on Sunday and demanded that the dressing room be opened.
However, Imran Khan, the media manager of Mohun Bagan, refused entry after citing competition rules. As per the complaint lodged by Mohun Bagan with the match commissioner, Khalid Jamil went on to abuse the staff using offensive words.
Thereafter, Imran contacted the match commissioner who arrived later and allowed the East Bengal coach entry to the dressing room.
But what escalated matters was when Imran went to request Khalid Jamil to attend the post-match press conference.
"(Khalid) Jamil wanted to gain access at 8:15 in the morning. When I denied entry, he abused me after which I contacted the match commissioner. Then when the commissioner arrived later in the day, he was allowed entry to dressing room," Imran Khan told Goal.
"Things stopped there. Again, after match I went to Jamil and requested him to attend press conference. But he started to abuse using offensive words. He even went on to spit at me."
East Bengal, who lost the match 1-0, claimed that it was Imran Khan who misbehaved with Khalid and it was not the other way around.
"But what about Khalid's bag being thrown away?", East Bengal official Debabrata Sarkar retorted.
I-League CEO Sunandho Dhar was later quoted as saying, "The time of entering stadium premises varies (according to a game)."