A power outage was affecting Mililani Technology Park Friday morning, according to the Hawaiian Electric Company.

It started a little after 3 a.m. and was affecting about 600 customers.'

HECO says it was caused by a broken underground cable.  Power will be out until crews are able to repair it.

There was another outage Thursday night at around 9 p.m. in the Mililani Mauka area.  Power was restored to the 7,000 homes affected by around 11 p.m.