Mohun Bagan chalked up a comprehensive 3-0 win over Shillong Lajong FC in a one-sided I-League encounter here on Saturday.
Asier Pierrick Dipanda Dicka (30th minute) put the Kolkata giants ahead in the first half before Akram Moghrabi (86th) and Shiekh Faiaz (89th) struck in the closing stages.
Mohun Bagan thus climbed a rung to the third spot in the league table, pushing arch-rivals East Bengal to fourth.
Both Kolkata giants are on 20 points from 12 matches each, but Mohun Bagan sit above their bitter rivals due to a superior goal difference.
Lajong remain fifth with 17 points from 14 matches.
A fast-paced second half did not help the hosts as they tried desperately to gain an equalizer which only resulted in a back and forth game with their determined opponents.
The Cote D’Ivoire-based striker Koffi could have found the back of the net but his mistimed header went astray, much to the dismay of the Lajong supporters.
However, the dying minutes of the game saw back-to-back goals from the visitors as they game swung decisively in their favour.
Akram doubled their lead in the 86th minute with a calm finish after the ball was dished out to him on a platter by Raynier Fernandes, who replaced Watson.
Having bagged all three points from Shillong defying all odds, high-flying Mariners will now head to Coimbatore to take on Chennai City on February 7 whereas Lajong will face the league leaders Minerva Punjab FC same day.