Two people were shot and killed Friday at a community college in Dearborn, Michigan, in what police believe was a murder-suicide, an official said.

A man and woman were found dead in a classroom building on the campus of Henry Ford Community College, Dearborn Deputy Chief Gregg Brighton said.

Investigators believe the man shot the woman but would not provide further information, Brighton said.

A shotgun was involved in the incident, which occurred in a classroom that was not being used, he said.

"We're in the very preliminary stages," Brighton said. "We've just made the scene safe. The crime lab is on the scene with detectives." Watch Brighton describe the scene »

Police responding to a report of gunfire at the school had entered the south hallway of the Fine Arts Building when they heard another gunshot, Brighton said.

"We were in the building when we heard the shotgun blast, and when we finally got to that room, we had two deceased parties," he said at a news conference. "We believe this is a murder-suicide."

The campus was briefly in lockdown and will remain closed for the rest of the Friday, a school official said.

The school's emergency system immediately notified students, faculty and staff about the shooting via e-mail and cell phone, said Marjorie Swan, vice president and controller of the college.

"Our hearts go out to the family and the friends of the young woman who lost her life today," Swan said.

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(CNN) -- Jeanne Thomas was sitting at her desk at work when she decided to check the security camera that she installed in her home. The Thomas home had been burglarized before, so she installed a monitoring device where she can watch a live video feed of the camera in her home.

When Thomas decided to pull up the feed of her house Wednesday morning, she couldn't believe what she saw. There was someone inside her home, someone she didn't know. Thomas picked up the phone and called 911.

"I'm watching my home on live monitor, and there is a black man in my house, and he is robbing it," she told the dispatcher. The woman on the other end of the call asked Thomas where she was, and Thomas replied, "I'm in Fort Lauderdale, at my work."

Thomas' home is in Boynton Beach, Florida, more than 20 miles away, yet she was watching over the Internet as two men walked through her home, picking up items. Watch the video from Thomas' home »

Police later arrested Curtis Williams, 20, and Steven Morales, 19.

According to the Boynton Beach Police, Williams and Morales entered the house through a pet door. As the 911 dispatcher was calling police to the scene, Thomas stayed on the line, giving a play-by-play of what she was seeing.

"He's in my house. I am seeing him walk around my house. He's in my bedroom right now," she said. The bedroom cannot be seen in the video, but the door from the living room into the bedroom is visible.

Thomas watched as the men wandered through her home, taking valuables such as her TV and Wii gaming console.

"This is unbelievable," she told the 911 dispatcher. "The cat is freaking out. The dogs are hiding."

One of the burglars took a bag of shredded cheese from the refrigerator and could be seen on the video stuffing it in his mouth. None of them noticed the small camera that resembles an air freshener.

"They walked right up to it and didn't know what it was," Thomas said later.

A few minutes after Thomas called 911, the video shows police officers entering the home.

According to the police report, "Williams and Morales had placed the victim's 37 inch flat screen TV, a safe, gaming machine with several misc. games (total value approx. $3000) on the victim's bed."

Williams and Morales told police that two other people, not seen on video, were also involved in the incident.

All four suspects were arrested and charged with burglary of a dwelling and attempted grand theft.

Thomas' husband thought she was nuts for spending $250 on the webcam system, telling her she would never catch anyone. But to her, it now seems like a smart investment.

Thomas hopes it will be a lesson for burglars.

"You never know who is watching you," she said.

by Kim segal CNN