A 20-year-old Watertown woman was killed Thursday night in a crash on Interstate 495 North in Marlborough, State Police said.
Mary Kostikian was ejected from her 2010 Honda Civic when it rolled over in the right travel lane near Exit 25A at 10:25 p.m., State Police said in a statement.
State Police said Kostikian was not wearing a seat belt, and they were investigating whether speed was a contributing factor in the crash.
Kostikian was transported to Marlborough Hospital, where she was pronounced dead.
Kostikian's uncle, Dick Hagopian, said that she was on the way to visit a friend in Worcester when the accident occurred.
"Mary was a very outgoing girl, full of life, and she had a lot of friends," Hagopian said. "The whole family is here, we can barely think straight."
Hagopian said that Kostikian was studying at Assumption College to be an accountant. She did not play sports in college, but at Watertown High she was captain of her basketball and soccer teams, he said.
She is survived by her parents and two younger brothers.
"Mary loved kids and was very family oriented. She was a happy kid," Hagopian said. "She just wanted to go to school and make her parents proud."
Steve Watson, headmaster at Watertown High School, said he was not at the school when Kostikian was a student.
"By all accounts, Mary was a delightful, outgoing young woman," Watson said. "We are just so saddened for her family, friends, and loved ones, and wish them the very best of healing."
Watson said that faculty and staff members who knew Kostikian had been notified. Guidance staff has also been made available for students who need it, and students who wish have been allowed to go home.