Electricity providers across Chile scrambled to restore service Tuesday after a sweeping blackout plunged 90% of the country into darkness, stranding commuters, knocking cell service offline and paralyzing businesses and daily life.

A large power outage struck most of Chile on Tuesday, resulting in a curfew until Wednesday morning for the areas hit by the blackout.

Much of the country lost electricity today in a blackout affecting millions of people. It’s disrupted business and traffic with lights out and intermittent mobile service, ABC reports. Officials are still investigating the cause,