NEW YORK (Reuters) -Phillips 66 has partially shut its 258,500 barrel-per-day Bayway refinery in Linden, New Jersey, after rainstorms in the region caused a power outage at the plant, three sources familiar with the matter said.

Phillips 66 confirmed the power outage, but declined to provide more details.

A computer that monitors emissions from the refinery's flare stack was damaged during flooding, according to a report filed with the New Jersey Department of Environmental Protection (DEP) on Tuesday.

All other monitoring equipment was functioning normally, the report said.

There was no major damage to critical infrastructure, and the refinery's flares were working properly after the overnight power outage, the Linden Police Department posted on Facebook on Tuesday.

Another report filed with the DEP on Tuesday noted that the sewer system at the refinery was leaking unknown amounts of residual oil into the Morses Mill Creek.

Phillips 66 was actively purchasing refined products from the New York Harbor spot market since Tuesday, two market participants said.