Oil prices fell by more than $5 a barrel on Friday, deepening a 10 percent collapse on Thursday.

It was the dollar strength that triggered the selloff and although the euro has then rebounded, it sparked another bout of long position liquidations, said Tony Machacek from Bache Commodities.

U.S. crude futures fell as much as $4 a barrel to below $96 and Brent was down $5 to below $106 a barrel.

(Reporting by Jessica Donati; editing by William Hardy)