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Searchers were combing the seacoast area Friday for a 19-year-old University of New Hampshire student who disappeared after she made plans to visit a friend earlier this week.

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Senior Assistant Attorney General Jane Young said investigators met Friday morning with Elizabeth "Lizzi" Marriott's father to assure him they are providing all the resources possible to locate her.

Marriott attended a class at the university Tuesday night and made plans to visit a friend in Dover. According to a flier being distributed by family members and friends Friday, her cellphone was last used in Dover at 10:11 p.m. Tuesday.

Lizzi Marriott's grandmother, Susan Marriott, was tending the phone at the Chester home where her granddaughter lives while other family members were out handing out fliers and searching for her.

"I'm just holding down the fort here in case a call comes from her, which would be such a godsend," Susan Marriott said.

She said the FBI and other investigators were at the house for much of the day interviewing family members.

"She is a good student and she's hard-working," her grandmother said. "She is a person that doesn't have a multitude of friends but she has good friends, a small group of good friends."

Lizzi Marriott is a 2011 graduate of Westborough High School in Massachusetts. She lives with an aunt in Chester, N.H., and commutes to the Durham campus. The Chester Police Department, where the missing person report was filed, is serving as headquarters for the investigation. Local police, as well as the state police, FBI and Fish and Game officials, are involved in the search.

Young, who heads her office's criminal bureau, was in Chester on Friday to help marshal resources and assist in the investigation. She also supervises all homicide investigations for the state.

"I wouldn't read anything dire into the fact we're here," Young said. "We have a missing student from UNH and when we can tap state, federal and local resources we can increase manpower significantly."

Marriott drives a 2001 tan Mazda Tribute bearing New Hampshire plate number 304-5397. Investigators have not located her car.

Marriott is described as being 5 feet 5 inches tall, with blond hair and blue eyes.

The family is offering a $10,000 reward for information leading to her safe return.

Young asks that anyone who has any information about Marriott's location or activities Tuesday night to call state police at 603-271-3636.

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