Haobam Tomba Singh (76’) came on from the bench to put Inter Kashi in the lead, before captain and centre-back Peter Hartley doubled the lead in the 79th minute.
This result means that Inter Kashi now stand on 33 points from 20 games at fifth in the league table, and have drawn level with Gokulam Kerala FC, who have played a game less; the Malabarians are ahead by dint of a better head-to-head record.
Meanwhile, Delhi FC remain on eighth with 22 points from 19 games, and are level on points with Rajasthan United FC. However, a better head-to-head record means that Delhi FC are ahead.