Last night’s assault has not been linked to the PSLM protest, but it has served to mobilize the University’s tightened security procedures.

A Harvard security guard noticed two suspicious men in the Straus Common Room shortly before 6 a.m. yesterday; when he approached them and asked them if they were students, both replied, “No.”

One man then grabbed the guard, threw him up against the door, knocking him to the ground. The assailant fled on foot, however, the guard managed to subdue the other man, who was then arrested by HUPD units from nearby Mass. Hall.

Vaugn Sneed, 26, of Cambridge, was charged with trespassing.

It is unknown whether Vaughn or the assailant have a connection to the PSLM protest. However, the incident has highlighted the strain placed on HUPD during the protest.

In recent days, HUPD has had to request help from CPD when responding to an assault, a chemical spill and a two-alarm fire because they lacked sufficient manpower.

As it is, HUPD officers are working 12-16 hours a day, including on their scheduled days off.

One HUPD officer joked that he hung a photo of himself on the wall at home so that his children would not forget what he looked like.

Last Thursday, HUPD Chief Francis D. “Bud” Riley asked for help from CPD in policing the Mass. Hall protest.

Since last Friday’s rally, half-a-dozen CPD officers have helped HUPD outside Mass. Hall.

—Staff writer Garrett M. Graff can be reached at ggraff@fas.harvard.edu.