CHARLOTTESVILLE -- A gubernatorial panel has requested more time to finish its investigative report on the shootings at Virginia Tech and now plans to release the document sometime next week.

Gerald Massengill, chairman of the eight-member panel, said after a nearly 11-hour closed-door meeting that it had been "a tough day" but that the discussions had been productive.

"It hasn't been one of those days where we've been in there fighting," Massengill said late Monday night. Officials added that panel members had been focused on making absolutely sure that everything in the report was accurate.

Panel members had hoped to finish reviewing the roughly 300-page draft report Monday and present the finished copy to Gov. Tim Kaine on Friday. The governor's office granted the panel's request for an extension.

Officials with the panel said they still planned to brief victims' family members today on what will appear in the document.

Gunman Seung-Hui Cho killed two students at West Ambler Johnston dormitory April 16. Later that morning, he fatally shot 30 people and himself at Norris Hall.

The panel's report will cover all aspects of the shootings, including Cho's brush with the mental health system, the actions of Tech administrators and police, firearms laws and the overall response in the aftermath of the shootings.

During a break in the meeting earlier in the day, Massengill said that if Cho could have been stopped, it would have had to happen before the first attack at Ambler Johnston, and not in the couple of hours that elapsed between the shootings.

After the shooting at Ambler Johnston, Cho returned to his room at Harper Hall, changed out of his bloody clothes and deleted his personal e-mail account, police have said. He also mailed a package of multimedia materials to NBC News in New York and a rambling, incoherent letter to the Tech English department.

Before April 16, classmates and teachers were frightened and disturbed by the 23-year-old English major's bizarre behavior and violent writings.

In 2005, he was held overnight in a psychiatric facility after his roommate reported that he might be suicidal, but a special justice released him the next day with orders to receive outpatient treatment.