"It was an early start for me this morning. I had a good feel to finish my first round with a few birdies and I made another good putt for birdie on my first hole this morning, which got my second round off to the perfect start," Chopra said.
"I didn't drive the ball as well as I did yesterday, but my putting was perfect and my wedges were great.
"My iron play needs a little bit more work on the driving range this afternoon but if I can get that sorted out and get some rhythm with that, then hopefully I should be in for a good weekend."
His compatriot Michael Jonzon and Scotland’s Jamie McLeary were Chopra’s closest challengers on nine under par – although neither had completed their second rounds.
Jonzon – 108th in The Race to Dubai, and probably in need of one more good payday to secure his card – mixed nine birdies with two bogeys in his first 17 holes, while Challenge Tour regular McLeary was four under par for his round with two holes left to play.
Luiten parred the first to remain eight under before the suspension, with Swede Christian Nilsson and Bangladesh’s Siddikur both carding second rounds of 67 to join him on that mark.
Nilsson said: "I’m really pleased with my day. I made a lot of birdies and only one or two bogeys, so I’ve got to be very happy. I’ve been driving the ball very well all week and finding a lot of fairways. And my putter has also been pretty hot, so if you put those two together, it adds up to a pretty good combination."
Defending champion and three-time Major winner Padraig Harrington played the first three holes in level par to remain on seven under.
Play resumed at 5.30pm local time after a two hour delay.