Update at 10 p.m. with cause.

As many as 5,900 PUD customers in the south Lynnwood and Mountlake Terrace area were without power on Sunday afternoon.

As of 6:30 p.m. Sunday, crews had been dispatched and were working on restoring power. About 1,163 customers had power restored by that time.

By 10 p.m., almost all customers had their power restored. PUD reported just 13 customers remained without power.

The cause for the outage was equipment failure.

This story will be updated as more information becomes available.