This is a tricky one. From this angle and if the underparts are yellow, I'm guessing a moulting Olive-backed.
Based on my observation the underpart is not yellow Mr Choy, its gray and have a few dark spots
Maybe it is a moulting Purple-throated. I'm not sure though. Sorry, Kamal.
According to Mr Dave Bakewell it an eclipse male Copper-throated ,Choy. Appreciate your visit to my blog. Thank you.
Well done Tn KM..great find here...
Tq Tn SS..waiting for the next birding trip with u..