Lahiri was sole third at 11-under and four shots behind Justin Rose (64) and Lucas Bjerregaard (63), who were at 15-under. Jeev moved to 10-under in tied fourth alongside Mathew Fitzpatrick (66).
Lahiri, who was even par for the front nine, had five birdies on the return journey, while Jeev, who was one-over on front nine racked up six birdies as both finished at five-under 65.
Lahiri, winner of Malaysian Open and Hero Indian Open this season, said, "I was not very focused on the front nine. But I calmed down a little bit and by the eighth, ninth hole, I started hitting it a little more solid. It was good to get birdies on 10 and 11 as they got me into the right zone mentally. I was just focusing on giving myself opportunities, and it was good.
"It is a great spot to be in. Also it is good to be playing well in second half of season as there are a lot of World ranking points. Hopefully I can make a move," he added.
Jeev also switched gears on his back-nine after struggling with an outward 35.
"Honestly it was a shaky start but got my bearings right after I made two birdies. But what got me going was on the 10th hole, I got very lucky. It jumped over the water and stayed up. I chipped it to about two feet and birdied it.
"I'm in better shape and I'm working a lot on my mental side. I think everything should fall in place and I'm ready to see what comes my way," said Jeev.
