UPDATE: Searchers Scouring San Francisco Bay for Missing Teen's Body

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Today officials with the California Highway Patrol announced that the search for missing Danville teen Alliy Bayliss has switched to a water recovery operation in the area near the Golden Gate Bridge, ending the ground search that began early Tuesday morning.

California Highway Patrol Captain Amy Mangan addressed the media with this statement:

"We have information that came to us in our search and rescue efforts yesterday as well as our investigative efforts that indicates Allison walked onto the Golden Gate Bridge shortly after 10 a.m., on Monday morning. It does not appear Allison walked off the Golden Gate Bridge. Our investigative efforts now switch to one of a possible suicide. The Danville Police Department is currently with Allison's family as well as staff from the Town of Danville to provide them council and support. The efforts of California Highway Patrol, U.S. Parks Police, National Parks Service, U.S. Coast Guard and the Golden Gate Bridge District will continue in our attempt to locate Allison." 

Mangan went on to say they were not in the possesion of a suicide note and "unfortunately sometimes there is no recovery in these types of situations."

Danville Police Chief Steve Simpkins said he received the news early Wednesday morning.

 “This is a very sad outcome,” he said. “Our hearts go out to the Bayliss family at this time, and we ask that you keep them in your thoughts.”

School district spokesman Terry Koehne gave this statement about Bayliss, a member of the junior varsity swim team and a "very good student academically." 

 "It's a terrible tragedy," he said. "I think this community went from being hopeful to having our worst fears realized."

The Bayliss family has extended their deepest gratitude and thanks to law enforcement, family, friends and the many volunteers who put in so much effort on behalf of their daughter.

A candlelight vigil is scheduled for Wednesday evening from 7 p.m. to 8 p.m. at , 989 San Ramon Valley Blvd.

10:00 a.m. Alliy's bike, which was found locked up Tuesday at a parking lot near the Golden Gate Bridge, is now gone. Simpkins says no new information is available yet.

8 a.m.: The search for a missing Danville girl who could be suicidal has resumed, according to Howard Levitt, director of communications for the Golden Gate National Recreation Area.

Levitt told KTVU news this morning that the search, taking place on both sides of the Golden Gate Bridge, will cover similar ground as Tuesday's efforts, including in the water. He said dozens of searchers are on the ground.

The widespread effort to find 15-year-old Allison Bayliss began about 5 a.m. Tuesday after her bike was found in San Francisco. It has drawn dozens of law enforcement agencies and volunteers and a blast of media attention.

Levitt said Tuesday night the search for Bayliss, last seen Monday morning at San Ramon Valley High School, was called off at 9 p.m. when darkness fell.

He said the best thing for concerned community members to do is to "continue to get the word out to the broader community," rather than helping with a physical search. 

A Find Alliy Bayliss Facebook page that was created Monday night and attracted more than 11,000 followers was no longer live as of Wednesday morning, reportedly because of negative comments. A new page can be found here. The social networking site has been a key communication tool in the efforts to find her, with family and friends posting updates by the minute and strangers offering their prayers and support.

Kevin Sawcheck, a friend of the family, said a search of Alliy's computer found directions to the Dublin BART station, as well as directions from the Embarcadero to the Golden Gate Bridge using Google Maps bicycle directions. This path led the search team to her bicycle, found locked at a bike rack in a parking lot at Fort Point near the Golden Gate Bridge.

The area is blocked off by yellow police tape, though this case is not believed to be criminal, and her helmet sits on the ground next to her bike.

"Everyone is just focused on finding Alliy," said  Sawcheck. "We are obviously very worried. Alliy, please come back. We all love you and want you to come back home."

Sawcheck said plans are for the search to continue as long as necessary.

A picture of Alliy, a girl most of the Bay Area never knew before Tuesday, is emerging. Clearly athletic, her swimmer's tan visible underneath her electric blue homecoming dress, Alliy has a wide smile, first in braces and then without — a family friend pointed out she got them off earlier this month.

Alliy, who has three younger siblings, attended elementary school in Danville and is a sophomore at San Ramon Valley High School.

A multi-denominational vigil is planned for her and her family, 7-8 p.m. Wednesday at  989 San Ramon Valley Blvd. According to the Facebook post: "All are welcome. We will be handing out candles, fliers, etc."

Allison was last seen wearing a red zip hoodie jacket, jeans and mismatching flip-flops, one green and one yellow. Allison is 5-foot-8, has blue eyes and blonde hair and weighs 130 pounds (see photo). She had a black and purple Diamondback mountain bike with her.

Anyone with information is asked to call 9-1-1 immediately or 925-646-2441.

We will update this story when more information is available.