Starting Monday, people who use Montreal's Metro and bus network could face a major scale back in service.

Maintenance staff with the Société de transport de Montréal (STM) have a mandate to go on strike from June 9 at 12 a.m. to June 17 at 11:59 p.m.

If the strike moves forward, bus and Metro services will be halted or halved outside of rush hours and late-evening hours — with the exception of Grand Prix weekend. Adapted transport service will be maintained at all times.

But the looming labour st…