Ubisoft Montreal was involved in a police operation according to Canadian news sources. Various news outlets originally reported the incident as a hostage situation, but that doesn't seem to be the case. The building was evacuated though no threat was ultimately identified.
https://www.techspot.com/news/87602-ubisoft-montreal-office-involved-fake-bomb-threat.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/87602-ubisoft-montreal-office-involved-fake-bomb-threat.html?utm_source=dlvr.it&utm_medium=blogger