Sydney commuters are experiencing significant disruptions this morning after train services on the city's northern lines were brought to a standstill due to urgent overhead wiring repairs.

The issues emerged during the busy morning peak period, leaving passengers stranded and facing serious delays across the affected network. Overhead wiring faults require trains to stop running through impacted sections while emergency maintenance crews work to restore services safely.

Commuters travelling through Sydney's north are advised to allow extra travel time and check for service updates before heading to stations, as the full extent of the disruption remains unclear while repair work continues.

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