Montreal’s transit authority is increasing security in certain metro stations to address safety concerns amid a rise in the number of people with mental health or addiction issues in the network.

Under a plan announced Wednesday, the Societe de transport de Montreal — commonly known as the STM — is deploying special constables and other safety employees in teams of four to monitor the 10 stations where security director Jocelyn Latulippe said riders have most reported feeling unsafe. He said uncivil behaviour has been the biggest issue.