The Federal Bureau of Investigation is seeking additional victims of a man who was found guilty of sextortion and was sentenced to 105 years in prison.

Lucas Michael Chansler, 31, of St. Johns, Florida was sentenced to 105 years in federal prison for engaging in an extortion scheme to produce child pornography.

In August 2014, Chansler pleaded guilty to 9 counts of producing child pornography.

Investigators say Chansler targeted 350 minors in 26 US states, 3 Canadian provinces and the United Kinggdom.

Of his 350 victims, only 109 victims have been identified.

The FBI says they are working on identifying the rest of the victims.

They have released his known screen names for Myspace, Stickam and AIM he used while extorting victims.

These are the most common names and you can click here for a complete list of all 135.

• argon1049
• poopers2212
• vhugh20191
• CaptainObvious
• anon
• Cameroon
• corpum15
• quinlorn1015 and quinlorn1039
• sk8er4life2021
• tyler
• VictorHugo

If you or someone you know communicated with someone with this screen name, you can click here to fill out a confidential questionnaire or you can call 800-CALL-FBI or visit the FBI website where they have posted more information on the case.