The Bellevue Police Department and King County Sheriff's Office arrested more than 100 people in a large scale undercover operation aimed at online prostitution in King County.

Over seven days, police say dozens of unsuspecting sex buyers answered online ads posted by undercover detectives, then exchanged often-explicit text messages describing sex acts they expected to buy. Police dubbed the investigation "Operation On Demand."

The buyers were arrested after showing up at a condo and agreeing to exchange money for sex.

Those arrested are expected to face the misdemeanor charge.

Bellevue Police Chief Steve Mylett says last year authorities dismantled a large scale human trafficking ring in Bellevue and this operation is a continuation of that effort.

"A year ago, the Bellevue Police Department and the King County Sheriff's Office dismantled a large scale human trafficking ring," said Mylett in a released operation. "This operation is a continuation of our effort to eradicate human trafficking crimes. We will continue to devote our combined resources to combat this plague."