RELATED VIDEO CNN's Tony Clark reports on the investigation into the Colorado school shootings Windows Media 28K 80K CNN has obtained an audio tape of Harris and Klebold from a court hearing they attended last year, and CNN's Tony Clark speaks to the judge about the boys (April 27) Real 28K 80K Windows Media 28K 80K To view the latest video streams on the Littleton school shooting, use the arrow buttons below to scroll through the video gallery.        Windows Media Real        28 K 80 K INTERACTIVE Amid grief, moments of reflection Columbine Memorial Audio and Images Interactive Map: Recent school shootings in the U.S.  ALSO: Columbine killers on tape Columbine teachers prepare for students' return Parents of hospitalized Columbine students hope for best Big schools can mean isolation, opportunity List of hospitalized victims from Columbine Fatalities at Columbine High Faith, heroics and bedtime snacks hailed at Columbine funerals  MESSAGE BOARD: Listening After Littleton

April 27, 1999
Web posted at: 6:31 p.m. EDT (2231 GMT)

In this story: Police: Klebold's girlfriend bought 2 guns Others could be charged Diary of death Classes to resume after last funeral Absentee rate high in Denver area RELATED STORIES, SITES

LITTLETON, Colorado (CNN) -- Three more funerals for victims of the Columbine High School massacre were held in Littleton on Tuesday and the entire Denver area, including radio and television stations, observed 30 seconds of silence at 11:21 a.m. MDT -- exactly one week to the minute from the time that the shootings began. Church bells tolled 15 times, once for each of the dead, including the two students blamed for the killings.

Family and friends of shooting victim , 16, gathered Tuesday morning at a local church to pay their last respects.

At a second service, mourners remembered , 16, a boy who treated others with "the utmost respect."

"Kyle was known as a gentle giant, and when he looked down on his parents, it was as their little boy," said Kyle's uncle, John Newhauser. Colorado Gov. Bill Owens was one of 800 people who attended the service.

A memorial service was also held Tuesday for Corey DePooter, 17.

Meanwhile, investigators said Tuesday that a report by a Colorado Springs gun dealer that five teens, including Eric Harris, tried to buy automatic weapons in his store five weeks ago was not backed up by a surveillance videotape.

Harris, 18, along with Dylan Klebold, 17, killed 12 classmates and a teacher in a hail of bullets and pipe bombs at Columbine High School April 20 before the two killed themselves.

Mel Berstein, owner of the Dragon Arms gun shop, told authorities that four boys wearing trench coats and a blond- haired girl, allegedly Klebold's girlfriend, entered his store in March and tried to buy an M-60 machine gun and an automatic rifle equipped with a silencer.

He said the incident was captured on a surveillance videotape that he turned over to federal authorities.

But federal agents reviewed the tape and saw no teen-agers or associates of the suspects, officials from the Jefferson County Sheriff's Department and the Bureau of Alcohol, Tobacco and Firearms said Tuesday.

Police: Klebold's girlfriend bought 2 guns

Police said the girlfriend of Klebold bought at least two guns used in the attack, according to two Denver area newspapers. The woman was questioned Monday and authorities described her as a witness, not a suspect.

She bought them at a Denver-area gun show soon after her 18th birthday in November, according to investigators quoted in the Denver Rocky Mountain News and The Denver Post.

Prosecutors said the weapons may have been purchased legally.

District Attorney Dave Thomas said prosecutors are not sure what knowledge she had about how the guns would be used.

Others could be charged

Investigators are still investigating whether anyone besides Klebold and Harris was aware of their plans in the days and weeks leading up to the attack.

Authorities have said Klebold's girlfriend, the suspects' parents or others could be charged as accessories if the district attorney's office determines they knew about the attack beforehand.

"We're looking at a fairly large number of people still. People that were very close to these individuals," said Mark Pautler, the chief deputy district attorney. "But we don't have anybody that we can say were additional individuals at this time."

Stone said three boys who were arrested near Columbine on the day of the attack have not been cleared in the case.

"I'm suspicious of their story," Stone said. "They are not out of the woods in this one yet."

Diary of death

On Monday, authorities said Klebold and Harris had aimed for an even bigger blood bath, plotting to kill hundreds of students, and then to hijack a plane and crash it into New York City. Investigators cited a diary they found that was kept by Harris, which revealed that the attack on the school was planned for more than a year.

A Jefferson County Sheriff's Department spokesman said authorities have found more more than 50 explosive devices -- ranging from pipebombs to propane tank bombs -- in the school, outside, in the car and at the home of suspect Eric Harris.

The attack's bold, bizarre nature led to speculation that the gunmen might have been taking drugs, but toxicology tests revealed no drugs or alcohol in their bodies, the county coroner's office said.

Classes to resume after last funeral

Columbine's campus remained closed on Tuesday to everyone except bomb squads and investigators.

Columbine teachers were due to report for duty Tuesday at nearby Chatfield High School, where armed sheriff's deputies and parents have been assigned to guard the doors.

The students of Columbine will begin classes in a split schedule at Chatfield on Friday instead of Thursday as previously planned.

Columbine Principal Frank DeAngelis told CNN the reason for the delay is that the last of the funerals for the victims will be held Thursday, for student Isaiah Shoels.

Nine students injured in the attack remained hospitalized Tuesday, one of them in critical condition. Doctors expect some to have long recovery periods.

Absentee rate high in Denver area

Meanwhile, other Denver-area schools reported a 20 percent absentee rate Monday -- five times the norm, a school official said.

Parents and students may have been frightened by an e-mail message, purportedly sent by gunman Eric Harris, that threatened more violence on Monday.

But investigators say they have little confidence that the message was created by Harris, and there were no major events in the area Monday.

Absenteeism was greatest at the Jefferson County schools closest to Columbine high, a school district spokesman said.

"The further away you got from the epicenter, the better the attendance was," he said.

Correspondents Martin Savidge, Charles Zewe and The Associated Press contributed to this report.