Police say the world's oldest profession has gone high-tech.
Arlington police say more and more prostitutes are leaving the street corner and turning to the Web.
"What we are seeing is just outright advertisements for sexual services," Deputy Chief Jaime Ayala said.
On one Web site well-known for its "adult services" advertisements, one out of every five ads in Dallas-Fort Worth originates in Arlington.
"We have received a number of complaints about what appears to be obvious postings of what appears to be prostitution," Ayala said.
The Arlington Police Department is now launching operation "You Never Know" to fight online solicitation. Undercover officers will be surfing the Web, posing as prostitutes and johns.
"If you respond to an ad or place one, you never know who might be on the other end of the line," Ayala said.