Rogers Communications will credit customers with a day of service after a Canada-wide outage Wednesday.

"I recognize this service interruption was unacceptable for our customers," Rogers president and CEO Nadir Mohamed said in a release early Thursday morning.

The company said it is unclear what caused the outage.

Service interruptions began in Quebec and Ontario around suppertime, but later in the evening the company acknowledged in a tweet that the problem was national.

Voice and SMS services, like text messaging, were affected. Rogers subsidiaries Fido and Chatr were also down.

Service was gradually restored to Rogers' nearly 10 million customers throughout the evening, and late Wednesday night. Rogers Tweeted:

1/2 Wireless voice and SMS services are fully restored. We continue to investigate the root cause. We apologize to our customers and thank — RogersHelps (@RogersHelps) October 10, 2013

The company later added that it would offer compensation for customers:

We will proactively compensate postpaid customers 1 day service for patience during service disruption. http://t.co/esRvsyfC0W — RogersHelps (@RogersHelps) October 10, 2013

Rogers.com was also down Wednesday due to "technical difficulties."