Dinesh Karthik was pictured in the TKR dressing room in the tournament opener.

Dinesh Karthik, the Kolkata Knight Riders captain, has issued an unconditional apology to the Board of Control for Cricket in India (BCCI) for having entered the Trinbago Knight Riders dressing room during a Caribbean Premier League game.

Karthik received the notice from the BCCI since he was in violation of his national contract, according to which he could not participate, in any capacity, in a league besides the IPL without a No Objection certificate from the BCCI.

After having received a showcause notice, he sent an email on September 6 to clarify his position, and stated that he was there on the invitation of KKR's newly appointed head coach Brendon McCullum.

"At the outset, I wish to state that I have not participated in Trinbago Knight Riders (TKR) in any capacity," he wrote in the email accessed by Cricbuzz.

"My coming to Trinidad was at the invitation of the newly appointed head coach of Kolkata Knight Riders Mr McCullum, who also happens to be the head coach of TKR. He felt that it will be useful for me as captain of KKR, to come for some discussions with him in regard to KKR."

Karthik's stay with in the Caribbean was to last from September 1 to 9, a period in which TKR was going to play three home games. However, after being issued a show-cause notice, he said that he won't be sitting in the dressing room of TKR.

"I wish to tender my unconditional apology for not seeking permission from BCCI to embarking on this visit. I sincerely request this oversight be excused," he further added.