Peel police have charged two people with first-degree murder after a teenage girl was found dead inside a Mississauga home early Thursday.

Investigators say the suspects and the victim "can be classified as friends."

The 13-year-old was found lifeless inside a residence at 1862 Bonnymede Drive, in Mississauga's Clarkson neighbourhood. She reportedly lived in the same neighbourhood with her father in a basement apartment.

Police say a 911 call at about 1:20 a.m. alerted them to the household.

The body of Alexandra Firgin-Hewie of Mississauga was taken out of the home at around 10 a.m. An autopsy is scheduled for Friday.

"Alexandra?!" exclaimed one woman who identified herself as Patricia, telling reporters the victim was a quiet, lovely girl.

"We just found out and it's a complete shock. It's just not who we expected it to be," said Sheela Rodrigues.

Neighbours said a mother and her adult son lived at the top of the house while the woman's daughter and her boyfriend lived in the basement unit.

One neighbour said he was disturbed by the turn of events.

"It's deeply shocking," he said. "I noticed something going on last night. I got home at about 12:30 a.m. and I started noticing the police activity."

Other neighbours said they heard some commotion coming out of the home. They said they heard doors slam and people yelling but didn't recall hearing any gunshots.

Another neighbour claims to have seen the victim standing at a window on Wednesday evening with a scared look on her face.

"I can't speak for what the motivation was behind all this because that is part of the investigation," Const. J.P. Valade of Peel Police told reporters.

This is Peel region's 27th homicide of 2008. Police say they made arrests not long after the 911 call.

Police have charged Rafael Lasota, 25, and Michelle Liard, 19, of Mississauga with first-degree murder. They are being held in custody and have court appearances scheduled for next week.

Anyone with information is being asked to call detectives at (905) 453-2121 ext. 3205. Anonymous tips can be left with Crime Stoppers at 1-800-222-TIPS.

With a report from CTV Toronto's John Musselman and files from The Canadian Press