Map and timeline

Matt Chittum | The Roanoke Times

Click to see a map documenting the timeline of sightings of Harrington in the hour before she was last seen.

Ongoing coverage

• Follow the search for missing Va. Tech student Morgan Harrington of Roanoke County

The search Sunday in Charlottesville for Morgan Harrington yielded no new leads, authorities said, but those involved said they remain optimistic.

Harrington, 20, of Roanoke County is a Virginia Tech student last seen Oct. 17 at a Metallica concert at the University of Virginia's John Paul Jones Arena.

Virginia State Police spokeswoman Corinne Geller said the search produced a couple of articles of clothing, none of which appeared relevant. She said police didn't find any significant clues or build on any possible leads.

Bob Smither of the Texas-based Laura Recovery Center for Missing Children said that more than 600 volunteers participated in Sunday's search. He said teams started in the morning and searched for two to four hours until there was no more daylight. Smither said much of the search was done on "challenging" rural terrain.

"This is certainly not the end of the search for Morgan," Smither said.

He said the Laura Recovery Center was able to train a number of volunteers, whom they will continue to support as the search continues.

-- Lerone Graham