COLORADO SPRINGS, Colo. -

The driver of a red truck who's believed to have made improper advances to a dozen girls and women appears to be growing bolder and drawing more concern from police.

On Tuesday morning, two women reported being propositioned by the man within a span of 20 minutes.  The first incident was around 9:20 in front of Noodles & Company at the intersection of Nevada Avenue and Southgate Road.  The second incident was less than a mile away near the intersection of Cheyenne Road and William Avenue.

They were his first reported appearances since he was seen Monday outside Chapel Hills Mall.  There now have been 12 reported incidents about the man this month.

Police said in the Tuesday incidents, the man raised his offer of paying females who watch him expose himself from $100 to $200.

"We have detectives from our Crimes Against Children unit who are dedicated to just this case, as well as we have all of our patrol officers briefed and knowledgeable on what's going on," said Lt. Catherine Buckley, of the Colorado Springs Police Department. 

"This morning, one of the victims called us right away -- which was fantastic.  We had officers in that area very quickly.  We need the public's help in finding this guy.  We know that somebody out there knows who this is."

Buckley said the man often approaches his victims by first asking for directions.  She asks that if he approaches you, try to remember as many details about him and report them to police immediately.

"We believe his truck has a temporary license tag," she said.  "It's smaller and harder to read quickly.  And usually the (proposition) doesn't last long.  The women leave quickly and he drives away quickly."

In an email message to KRDO NewsChannel 13, Jan Karsten suggested that people remember to use their cellphone cameras to take pictures of the man if he approaches them. 

Still, many people in the Southgate area said they hadn't heard  about the man. 

"Pretty shocking," said Nicole Elizabeth, a mother of three.  "This is a populated area, and there's a lot of people around.  It's quite scary."

Another mother, Rebeca Aldava, agreed.

"The harsh reality (is) it's real," she said.  "I'd like for my kids to know that there are sick men and women out there."

Police describe the man's vehicle as a newer model, full-size, four-door truck, ruby red or maroon in color with black running boards, tinted windows, tan cloth interior and temporary license plates.  The driver is described as a white man in his 20s or 30s with a thin build, and short dark hair, and wearing a ball cap and military-style clothing.

Call police if you have any information about the case.

Police said there have been no further reports about a Hispanic man in a white truck who approached a teen Tuesday and asked if she wanted a ride.