Riding some rock solid tackle by stand-in captain Ravinder Singh Pahal and Amit Chhillar, Delhi Dabang pinned down almost every effort of the home side en route to capping a comprehensive 32-21 win.
Delhi also were menacing with their raids with Kashiling Adake and Rohit Chaudary scoring six each to hand them a commanding 10-point lead with two minutes left.
Having returned to winning ways against Puneri Paltan, Delhi (10) thus displaced Bengal Warriors from fourth place with second successive win here.
Backed by cheering fans, Bengal Warriors on the other hand cut a sorry figure, ending their home stretch on a disappointing note.
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U Mumba (25 points) lead the eight-team standings with an all win record, 10 points clear of Telugu Titans and Bengaluru Bulls after the conclusion of Kolkata leg.
The caravan style league's next and third stop will be Sawai Mansingh Stadium in Jaipur where hosts Pink Panthers will face Patna Pirates, and Telugu Titans will take on U Mumba tomorrow.
Captain Manjeet Chillar put up an allround show in both raid and tackle to log six points.
Chillar was finely supported by Ashish Chhokar who carded six raid points including three bonus points to be awarded 'Best Raider'.
Local lad Rajest Mondal too impressed in front of the home crowd as he chipped in with four raid points and was instrumental in Bengaluru's comeback from behind.
This was Bengaluru's third win from four matches to remain on third place with 15 points in the table.