Approximately 1,600 residents were left without power Friday night after an outage hit the Logan Heights area, San Diego Gas & Electric officials confirmed.

The power outage was reported around 5 p.m. near South 38th Street and Logan Avenue. It also affected some customers in Mountain View and Lincoln Park, SDG&E said.

SDG&E officials attributed the cause of the power outage to a mylar balloon that somehow made contact with a power line. They're investigating to determine if any other factors contributed to the outage.

Crews worked to repair the damage Friday night and restore service as soon as possible. They expected power to be restored to customers by 11 p.m.

By Saturday morning, approximately 500 residents in the area were still without power. SDG&E expects power to remaining customers sometime between 12 p.m. and 12:45 p.m.

Meanwhile, a second unrelated power outage hit the South Bay area Friday night, leaving about 2,000 customers without power in parts of Imperial Beach and Nestor.

SDG&E officials investigated the cause of that outage and expected power to be restored to South Bay residents just after 9 p.m.