BCCI-appointed Commissioner Sudhir Nanavati, investigating the slapping row between Harbhajan Singh [Images] and S Sreesanth [Images], on Tuesday said he was left stunned after seeing the video footage of the incident.

"What I saw was shocking but it has made my job easier. It will also help me in my further investigation," he told reporters after viewing the footage of the incident, that took place after an Indian Premier League match between Mumbai Indians and Kings XI Punjab on April 25.

Nanavati saw the footage at the BCCI headquarters with IPL Chairman and Commissioner Lalit Modi, Board Secretary Niranjan Shah and Joint Secretary M P Pandove.

The Ahmedabad lawyer will submit his inquiry report on the matter to Board President Sharad Pawar [Images] on Monday.

Nanavati took the statement of match referee Farokh Engineer and will also speak to Mumbai Indians coach Lalchand Rajput, who was allegedly standing behind Harbhajan when he slapped Sreesanth after the match.

He has already spoken to umpire Amish Saheba, who was suspended for a match after criticising Sreesanth's behaviour in an interview. Saheba had, however, denied making any statement against Sreesanth.

With this, Nanavati is expecting to wrap up the investigation by Sunday and send his findings to the BCCI chief on Monday.

On Monday Nanavati had summoned Harbhajan and Sreesanth to Ahmedabad this weekend.

"I have summoned them. They have been told to come either on Friday or Saturday. Harbhajan will be coming on Friday. Sreesanth is yet to confirm a date," he had told PTI on Monday.

Nanavati was asked by the board to probe the incident after Harbhajan was banned from the rest of the IPL by its disciplinary committee.

 On whether Harbhajan could be punished twice for the same offence, Nanavati said "according to the BCCI contract, he gets match fee for the whole year. He is also getting money separately for playing in IPL."

"If he is getting paid by both IPL and BCCI at the same time, he will be punished twice", he added.