Thailand's Suteepat Prateeptienchai grabbed the 36-hole lead in the Asian Development Tour's OB Golf Invitational presented by Jababeka, carding a second round 64 for a 12-under-par total.

Prateeptienchai tops the standings by two shots from compatriot Piya Sawangarunporn who shot a superb 63 at the par-70 Jababeka Golf & Country Club in West Jawa, Indonesia.

First round leader Ervin Chang of Malaysia lies third on nine-under-par after carding a 69  The rookie professional had opened with a stunning 62 and is still well in the hunt, just three shots off the pace in the US$70,000 event.

LEADING SCORES
-12 - Suteepat Prateeptienchai (THA) 64-64
-10 - Piya Sawangarunporn (THA) 67-63
-9 - Ervin Chang (MAS) 62-69
-6 - Kade McBride (AUS) 65-69, Nirun Sae-Ueng (THA) 66-68
-5 - Jeremy Wendelken (USA) 67-68, Varanyu Rattanaphiboonkij (THA) 65-70, Matt Killen (ENG) 67-68, Chonlatit Chuenboonngam (THA) 65-70, Chanat Sakulpolphaisan (THA) 68-67