Two Dartmouth College students and a sorority on campus have been charged in the death of a 20-year-old student at the Ivy League school who was found dead in a river after an off-campus party this summer.

Members of the Beta Alpha Omega fraternity Matthew Catrambone and Samuel Terry were charged with a misdemeanor for providing alcohol to a person under 21, while Alpha Phi sorority was charged as a corporation with one count of facilitating an underage alcohol house, police in Hanover, New Hampshire, said.

Prior to his death, police said that Won Jang, a member of Beta Alpha Omega, had attended a party organized by the sorority and members of his fraternity gave him alcohol. Most of the party’s attendees were under the age of 21, police said.

Toward the end of the party, several attendees made “a spontaneous decision” to swim in the Connecticut River, police said. However, a heavy rainstorm hit and Jang couldn’t be found as the revelers began to run and take cover from the storm.

Jang, who was originally from Middletown, Delaware, did not know how to swim, his family told authorities.

The 20-year-old biomedical engineering major was reported missing the next day, and authorities later found his body in the river about 65 feet from shore.

He had a blood alcohol level of 0.167%, police said — more than twice the legal limit to drive.

Jang had been taking part in Sophomore Summer, a time for rising juniors to stay on campus and participate in an immersive and more relaxed summer course, according to the Ivy League’s website.

“Dartmouth has long valued the contributions that Greek organizations bring to the student experience, when they are operating within their stated values and standards,” the college said in a statement. “These organizations, as well as all Dartmouth students and community members, have a responsibility to ensure Dartmouth remains a safe, respectful, equitable, and inclusive community for students, faculty, and staff.”

With Post wires