Passenger train service has resumed on Via Rail's busy Toronto-Ottawa-Montreal corridor, a day after it was halted by a train derailment near Cobourg, Ont.

Via was able to get trains moving on the route Sunday morning, starting with one departing Ottawa at 8:35 a.m. ET for Toronto.

The track in both directions was closed after 23 cars of a 130-car CN freight train derailed late Saturday morning.

Via offered affected ticket-holders bus trips or refunds.

Canadian National said there were no injuries and no hazardous materials was involved in the derailment, which the Transportation Safety Board is investigating.

A parallel Canadian Pacific Railway track was forced to shut down briefly because of the incident.

The interruption in Via Rail service comes just a week after a protest by an aboriginal group closed the same line, blocking trains for more than a day.