Quebec police have arrested a woman who they say hacked into people's computers, spied on them via their webcams, taunted them over their speakers and forced them to look at "extreme pornography."

RCMP said she targeted people both in Canada and internationally, and some of her victims were children. Mounties have identified eight victims so far.

"But we know that there's more," Const. Philippe Gravel said.

Valerie Gignac, 27, allegedly used a remote administration tool to take control of computers infected with a virus.

"The investigation shows that the suspect used various methods to harass her victims, including by eavesdropping on private conversations and by communicating with victims through the speakers of their infected computers," Mounties said in a written statement.

"She also frightened her victims by taking over control of their computers and by logging on extreme pornography websites."

Cops allege Gignac posted videos of herself on YouTube taking over unsuspecting people's computers and scaring them.

What's more, she's allegedly the owner of a hacking forum with 35,000 members worldwide, which is how police got on her trail.

Mounties were investigating a different file and combing through forums when they stumbled upon the alleged hacker from Saint-Alphonse-de-Rodriguez, Que.

"She kind of got our attention," Gravel said.

Mounties have since seized all the data from her forum, including private messages, as well as computer equipment from her home.

"We have lots and lots and lots of information to go through," Gravel said.

Gignac is charged with unauthorized use of computer and mischief in relation to computer data. She appeared in Joliette, Que., court Wednesday. More charges may be pending.