From the Denver Post:
The first threat was e-mailed to the labs – part of CU’s ecology and evolutionary biology department housed in the Ramaley Biology building – on Friday. Wiesley said Monday that morning staff members found envelopes with the threatening documents slipped under the lab doors.
I hope these just come from a prankster without serious intent. We’ve seen too many times recently how someone who is truly demented can nonetheless get hold of weapons and cause considerable damage.
HT: The Panda’s Thumb. Further details will be posted there, though I will link to them from here as I notice them.