A search for a missing University of New Hampshire student intensified Friday as law enforcement officials launched an expanded investigation into the disappearance of 19-year-old Elizabeth Marriott.

A search for a missing University of New Hampshire student intensified Friday as law enforcement officials launched an expanded investigation into the disappearance of 19-year-old Elizabeth Marriott.



State and federal authorities have joined in the search for Marriott, who disappeared Tuesday after attending a class at UNH.



Police believe Marriott's last known location was in the Dover area.



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.



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



Marriott 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.



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



Young, who heads her office's criminal bureau, was in Chester Friday to help marshal resources and assist in the investigation.



“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.”



Young said the extensive search has grown to involve local police, state police, the FBI, Dover police, Fish and Game wardens and UNH police.



“We have a pretty broad search area,” she said.



Searchers were combing the Seacoast area Friday for the missing student, she said.



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.



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

Material from the Associated Press was used in this report.