A fatal stabbing on Virginia Tech’s campus has triggered a crisis-alert system that was revamped after a deadly mass shooting there in 2007, reports the Associated Press. An electronic alert system warned students by eMail and text message to stay in place while police investigated the incident around 7:45 p.m. on Jan. 21–about half an hour after the suspect was taken into custody. They were cleared to resume normal activity about an hour later. A graduate student from China has been charged with murder in the case. The victim, a female graduate student who was not identified, was stabbed to death at a cafe in the Graduate Life Center. Police believe she knew the man accused of attacking her, 25-year-old Haiyang Zhu, campus officials said in a news release. The university’s alert system was revamped after gunman Seung-Hui Cho took 32 lives before turning the gun on himself in an April 2007 rampage. The revamped alert system was first used last November when an exploded cartridge from a nail gun produced sounds similar to gunfire near a dormitory. During that scare, police searched a residence hall before determining the sounds came from the tool. The scare prompted concerns about the alert system, because many students didn’t get the message. (See "Questions abound as emergency alert flops."). There were no reports of failure in the system this time around…

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