A John Hopkins University student with a samurai sword killed a suspected burglar at his off-campus home, Baltimore police said.

Around 1:20 a.m. Tuesday, a 20-year-old chemistry major student confronted a man hiding inside his garage, asked him what he was doing and threatened to call police. That’s when the man lunged at the student who defended himself with his sword, police said. Witnesses said they heard blood-curdling screams.