An intervention by emergency medical services has led to a shutdown of the orange metro line between Cartier and Montmorency stations, comprising the entirety of the line's Laval extension. Service is expected to resume by 14:25, according to the STM website. The STM also alerted passengers to the service interruption via the ligne orange Twitter account.\nUPDATE: As of 14:20, service is resuming on the orange line.\nEARLIER: This shutdown comes after an hour-long shutdown of the entire line, between Côte-Vertu and Montmorency stations, on Sunday, December 22.\nThat event, the STM wrote on Twitter, was due to the presence of smoke. MTL Blog reader submissions suggest the smoke came from Jean-Talon station.\nThe circumstances leading to the current shutdown in Laval are unclear.\n[Métro service status] 🚇⚠️ All efforts are made to ensure that service will resume as quickly as possible. Urgences Santé and our intervention teams are on site. pic.twitter.com/rcZsue25di— Ligne Orange (@stm_Orange) December 23, 2019\nSTM\nAs of 14:20, service is gradually resuming between the stations.\nService gradually resuming on the ORANGE line. #stminfo K— Ligne Orange (@stm_Orange) December 23, 2019\nShutdown ORANGE line between Cartier and Montmorency. Inter. Emergency medical services. Service expected to resume at 14:25. #stminfo F— Ligne Orange (@stm_Orange) December 23, 2019\nWe will update this article with information as it becomes available.