• WDBJ General Manager Jeff Marks said of Vester Flanagan, "Two years ago, we had to separate him from the company. We did understand that he was still living in the area." He added that WDBJ is cooperating with police and has handed over to police information on Flanagan's history with the station and the video of the shooting.

• Though Marks has heard of Flanagan leveling accusations in the past, he said, "I don't think (reporter) Alison (Parker) and that individual even overlapped here." Marks added that he was not exaggerating when he says that Parker and photographer Adam Ward were "the kindest and nicest people who worked here. ... I can't figure out any connection."

• The shooting made Marks want to step out of his role as a journalist and say of the shooter, "I don't know whether I want him to live or die," he told CNN.

• Law enforcement confronted Vester Flanagan on Interstate 66 and Flanagan shot himself, officials tell CNN. It is not clear whether he was killed or injured.

• ABC News reported that it has received a fax containing a 23-page manifesto from someone named Bryce Williams, the news outlet tweeted. The document has been handed over to investigators, ABC said.

• Virginia Tech, photographer Adam Ward's alma mater, said in a statement, "It is shocking and deeply saddening for this community to be again struck by gun violence. We deplore this senseless violence, now seemingly commonplace in our society."

• One of Ward's professors, Robert Denton, added, "Adam was a delightful person. He worked hard -- you could tell he loved what he was doing. He wasn't afraid to pitch in and do whatever was necessary for the broadcast. He did whatever was needed with a smile and with grace. He was simply a very nice young man and very professional."

Full story

Police are seeking a former WDBJ-TV reporter in connection with the shooting deaths of a reporter and photographer on live television Wednesday, a representative of the Augusta County Sheriff's Department said.

Flanagan worked at WDBJ as a reporter for about a year using the on-air name, Bryce Williams, according to a former WDBJ employee.

Flanagan was fired from the station, though the reason was not made public, the ex-employee said.

It is believed that Flanagan is still in the Virginia area, a law enforcement source briefed on the search said.

Two videos posted on a Twitter account under the name, Bryce Williams, show someone walking up to the WDBJ news crew and pointing a gun at them.

Another tweet says, "I filmed the shooting." The Facebook and Twitter account were suspended shortly after the tweets.

One of the videos shows the gunman approaching WDBJ reporter Alison Parker and photographer Adam Ward as Parker conducted a routine interview about a local story outside Moneta, Virginia.

Ward's back is to the gunman. Parker is in profile, and the interviewee is facing the gunman. The shooter appears to take his time aiming the gun, presenting it and then withdrawing it, before composing the angle of his video. He opens fire on Parker first. Both Parker and the interviewee scream.

Did suspected gunman post executions to social media?

Shocking morning broadcast

On air, the audience saw the camera fall to the ground and caught the briefest glimpse of a man who appeared to point a gun toward the downed cameraman.

The station cut away to a shocked anchor, Kimberly McBroom, back in the studio.

Parker, 24, and photographer Adam Ward, 27, were killed at Bridgewater Plaza near Moneta, the station reported later.

Ward's fiancée was in the control room and saw the shooting, WDBJ General Manager Jeff Marks told CNN.

The woman being interviewed, Vicki Gardner, executive director of the Smith Mountain Lake Regional Chamber of Commerce, was shot in the back and is in surgery, said Barb Nocera, the chamber's special projects manager said.

The gunman is believed to have fired six or seven times, Marks said.

He remains on the loose. The Bureau of Alcohol, Tobacco, Firearms and Explosives has joined in the manhunt, while the ATF and FBI are participating in the investigation. Area schools are on lockdown.

Virginia Gov. Terry McAuliffe told WTOP radio in Washington that the suspected gunman may be a disgruntled employee of the TV station.

Authorities know the identity of the man believed to be the shooter, a law enforcement official told CNN.

Parker a 'rock star'

"We do not know the motive," Marks said. "We do know the Franklin County sheriff ... they are working very diligently to track down both the motive and the person responsible for this terrible crime against two fine journalists," he said during the station's coverage of the shooting.

"Our hearts are broken," Marks also said. "We have people walking around here in tears, lots of hugs."

McBroom described Parker as a "rock star" and said, "You throw anything at that girl and she could do it."

After photographer Adam Ward was shot, he managed to capture a brief image of the suspected gunman.

Another journalist at the anchor's desk said Ward was engaged to be married to morning show producer at WDBJ, Melissa Ott, and Ward recently told her, "I'm going to get out of news. I think I'm going to do something else."

Ward joined WDBJ in 2011 after graduating from Virginia Tech with a degree in communication and media studies, according to his Facebook page. He enrolled at the university in 2007, the same year a gunman went on a deadly rampage, leaving 32 people dead.

In April, days before the eighth anniversary of the campus massacre, Ward changed his Facebook profile photo to an image of the Virginia Tech logo with a black ribbon.

Parker was the morning reporter for the Roanoke station and a native of Virginia, having spent most of her life outside Martinsville. She started with WDBJ as an intern, her biography on the station's website says.

She previously worked with another CNN affiliate, WCTI-TV, in Jacksonville, North Carolina, near Marine Corps Base Camp Lejeune. She was a graduate of James Madison University's School of Media Arts and Design in Harrisonburg, Virginia.

Coworker/boyfriend mourns

Chris Hurst, a reporter for the station, tweeted that he and Parker "were very much in love" and had just moved in together after dating nine months, "the best nine months of our lives. We wanted to get married. We just celebrated her 24th birthday."

He continued, "She was the most radiant woman I ever met. And for some reason she loved me back. She loved her family, her parents and her brother."

Hurst described himself as "numb."

Parker and Ward worked together every day, Hurst tweeted. "They were a team. I am heartbroken for his fiancee," he wrote.

"You know, you send people into war zones, you send people into dangerous situations and into riots, and you worry that they are going to get hurt. You send somebody out to do a story on tourism and -- how can you expect something like this to happen?" Marks told CNN.

A local pastor, "a friend of the newsroom," is at the station, consoling Parker's and Ward's co-workers, he said.

CNN's Pamela Brown, Jason Hanna, Lee Smith, Ashley Fantz, Carol Costello, Brian Stelter and Mariano Castillo contributed to this report.