The campus in on lockdown: People report seeing a man with a gun, and the school received word from someone saying that his roommate (it’s unclear whether this means a Yale student) said he planned to come to campus and shoot people.
Here’s the message when you go to yale.edu right now.
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UPDATE: Things seems to have calmed down, and the lockdown has for the most part been called off. Police are suggesting that sightings of someone with a gun were most likely people seeing first responders to the scene.