Yale University’s Public Safety officers are urging students to remain vigilant following a robbery investigation over the weekend.

On Sept. 21, a graduate student was walking in the 1000 block of Chapel Street just after 11:15 p.m. when he was approached by two masked males, according to Anthony Campbell, chief of the Yale Police Department. The student was forcibly restrained as the males took his wallet, Campbell said.

An investigation is underway after a Yale graduate student was robbed and restrained, according to Yale police. They said two masked males restrained the student at 1000 Chapel St. around 11:16 p.m. on Saturday,