Liffe coffee, cocoa fall in commodities sell-off

* Liffe May robusta coffee ends down $49 at $2,508 a tonne. Drop in coffee prices led by slide in ICE arabicas.

* Liffe May cocoa ends down 15 pounds at 2,244 pounds a tonne. London cocoa pushed lower by sharp drop in ICE futures due to long liquidation.

* Liffe May white sugar falls $23.50 to close at $727.60 a tonne. Market remains rangebound, turning lower on investor selling, under pressure from slide in ICE raw sugar futures.