The attack launched on Oct. 19, affected 1,000 of the transit agency's 1,600 servers. Of those, 624 are considered operationally sensitive.

The STM says no ransom demand was made.

The bus slammed into a tree at 1:15 a.m. on Notre-Dame Street East in the borough of Mercier-Hochelaga-Maisonneuve.

Montreal's public transit system is back to enforcing its ticket validation and front-door boarding on all buses. Around 2,000 buses were retrofitted with Plexiglas to protect drivers and riders.

Face coverings became mandatory on public transit on July 13, except for those with medical exemptions and for those aged 12 and under.

"Our strategy is to make it easy for them to respect the new rule," said the STM's Chairman of the Board of Directors Philippe Schnobb.

A key bus stop is back in service in Montreal's West Island following complaints from concerned residents and drivers over its temporary but sudden shutdown.

The work to make McGill Metro station universally accessible will impact nearby streets, move some bus stops, and require cyclists to make detours.

A corridor built in 1966 that grants access to Montreal's Place des Arts will be more accessible thanks to a $ 4.2 million grant from the province.

The line's eastern branch shut down shortly before 6:45 a.m. Monday after a train broke down.