Authorities at Duke University said they are intensifying efforts to keep
students safe after three crimes in three days.
A graduate student was killed Friday, while two people said a man displaying a gun robbed them in separate incidents near off-campus apartments Sunday night.
Officials said the Duke Police Department is extremely concerned
about the type and frequencies of the crimes. Both Duke and Durham police will increase patrols near the campus. University officials also said they are reviewing safety measures.
Authorities said they do not know if the robberies are connected to the death of 29-year-old graduate student Abhijit Mahato. He died from gunshot wounds in his apartment.