Oil Rises on Concern Over Middle East Supply Disruption

A worker collects a crude oil sample at an oil well operated by Venezuela's state oil company PDVSA in Morichal, Venezuela, on July 28, 2011. Carlos Garcia Rawlins/Reuters

LONDON—Oil futures rose more than $1 on Monday, extending gains after four weeks of decline on demand worries and concern over Middle East supply disruption owing to the Israel-Hamas conflict.

Brent crude futures rose $1.18 to $81.79 a barrel by 1132 GMT. U.S. West Texas Intermediate crude was up $1.05 at $76.94.