Al-Fatamni, who fled to the nearby city of Misrata following the attack, said four revolutionary fighters were killed and 25 others were wounded. He said the Libyan Defense Ministry has not sent any forces to the area.

A top commander of a revolutionary brigade in Bani Walid, Ali al-Fatamni, who was present in Benghazi during the attack, says he has lost contact with other fighters in the town.

The bold attacks, which have led authorities to declare states of emergency in several areas, are the latest breakdown in security, three months after Gadhafi’s capture and killing. Protests have surged in recent weeks, with people demanding that the interim leaders deliver on promises of transparency and compensation for those injured in the fighting.

Bani Walid, 90 miles (140 kilometers) southeast of Tripoli, was one of the last Gadhafi strongholds to fall to revolutionary forces amid a monthslong civil war. Gadhafi’s son and longtime heir apparent, Seif al-Islam, was long believed to have been hiding in the town.

Seif al-Islam, who has been charged with crimes against humanity by the International Criminal Court, was captured in November by fighters from the town of Zintan in Libya’s western mountains, who continue to hold him.

“It is the biggest loss for the party … and it is our people and nation’s biggest sadness,” an anchorwoman clad in black Korean traditional dress said in a voice choked with tears. She said the nation must “change our sadness to strength and overcome our difficulties.”

South Korean media, including Yonhap news agency, said South Korea put its military on “high alert” and President Lee Myung-bak convened a national security council meeting after the news of Kim’s death. Officials couldn’t immediately confirm the reports.

The news came as North Korea prepared for a hereditary succession. Kim Jong Il inherited power after his father, revered North Korean founder Kim Il Sung, died in 1994.

In September 2010, Kim Jong Il unveiled his third son, the twenty-something Kim Jong Un, as his successor, putting him in high-ranking posts.

Traffic in the North Korean capital was moving as usual Monday, but people in the streets were in tears as they learned the news of Kim’s death. A foreigner contacted at Pyongyang’s Koryo Hotel said hotel staff were in tears.

Asian stock markets moved lower amid the news, which raises the possibility of increased instability on the divided Korean peninsula.

South Korea’s Kospi index was down 3.9 percent at 1,767.89 and Japan’s Nikkei 225 index fell 0.8 percent to 8,331.00. Hong Kong’s Hang Seng slipped 2 percent to 17,929.66 and the Shanghai Composite Index dropped 2 percent to 2,178.75.

TV footage showed heavily armed officers walking around campus, caravans of SWAT vehicles and other police cars with emergency lights flashing as they patrolled nearby.

Virginia State Police will be taking over the investigation, according to the news release.

“The campus community should continue to shelter in place and visitors should not come to campus,” the school said.

The suspect was described as a white male wearing gray sweat pants, a gray hat with neon green brim, a maroon hoodie and backpack.

A message left with the university wasn’t immediately returned. Campus police referred all questions to the university.

“It’s crazy that someone would go and do something like that with all the stuff that happened in 2007,” said Corey Smith, a 19-year-old sophomore from Mechanicsville, Va., who was headed to a dining hall near the site of one of the shootings, but stayed inside after seeing the alerts from the school. “It’s just weird to think about why someone would do something like this when the school’s had so many problems.”

Harry White, 20, a junior physics major, told The Associated Press in a phone interview that he was in line for a sandwich at a Subway restaurant in a campus building when he received the text message alert about the shooting.

White said he didn’t panic, thinking instead about a false alarm about a possible gunman that caused the campus to be locked down in August. He used an indoor walkway to go to a computer lab in an adjacent building, where he checked news reports.

“I decided to just check to see how serious it was. I saw it’s actually someone shooting someone, not something false, something that looks like a gun,” White said.

White said the campus was quieter than usual because classes ended Wednesday and students are preparing for the start of exams. He said he didn’t see anyone outside from the windows of the computer lab after he received the alert. But he also didn’t detect any signs of panic.

The shooting came the same day as Virginia Tech, which has an enrollment of about 30,000, was appealing a $55,000 fine by the U.S. Education Department in connection with the university’s response to the 2007 rampage, when a student gunman killed 32 students and faculty and then shot himself.

A report of a possible gunman at Virginia Tech on Aug. 4 set off the longest, most extensive lockdown and search on campus since the 2007 bloodbath led the university to overhaul its emergency procedures. No gunman was found, and the school gave the all-clear about five hours after sirens began wailing and students and staff members started receiving warnings by phone, email and text message to lock themselves indoors. Alerts were also posted on the university’s website and Twitter accounts.

That incident marked the first time the entire campus was locked down since the 2007 shooting, and the second major test of Virginia Tech’s improved emergency alert system. The system was revamped to add the use of text messages and other means besides email of warning students.

The system was also put to the test in 2008, when an exploding nail gun cartridge was mistaken for gunfire. But only one dorm was locked down during that emergency, and it reopened two hours later.

Eric Tucker and Ben Nuckols in Washington and Michael Felberbaum and Larry O’Dell in Richmond, Va., contributed to this report.