MONTREAL — A problem with the signalling system caused a service interruption this morning on Montreal’s light-rail network.

The malfunction occurred on the new branch of the rail system that opened last month, connecting downtown Montreal with its northern exurb of Deux-Montagnes, Que.

A spokesperson for the REM — Réseau express métropolitain — says the signalling system allows the automated trains to recognize the tracks ahead and the presence of other trains or objects.

Service was suspended at several stations for a few hours until the problem was resolved around 9:30 a.m.

The spokesperson did not say whether the issue was linked to the frigid weather in Montreal, with temperatures feeling like -23 C with the wind chill this morning.

The first leg of the light-rail network, which

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