A Thai police official has said an arrest warrant will be issued Thursday for suspected Canadian pedophile Christopher Paul Neil, following new allegations.

Neil, a 32-year-old native of British Columbia, recently worked as an ESL teacher in Korea and is believed to be in Thailand.

CTV's Steve Chao, reporting from Bangkok, Thailand, said Wednesday that a Thai teenager has alleged to police that he and his friends were "molested and then paid for various sexual acts" in 2003.

The teenager, who claims he was paid to perform oral sex, was 14 at the time.

Neil worked at the Ramkhamlaeng Advent International School -- a Christian school in the outskirts of Bangkok -- between August 2003 to January 2004, reports The Associated Press.

An assistant chairman at the school told AP that Neil didn't pass probation and was given verbal and written warnings about his performance.

Rajdeep Takeuchi, who served as principal of the school during Neil's tenure, said the issues involved sloppy lesson plans and cases when he left students unsupervised. Takeuchi said no complaints of abuse were reported.

Last week, Interpol released images of the alleged child molester, which were taken from Internet pictures that had masked the suspect behind a digitally created swirl.

Police have about 200 photos of a man with a dozen boys. The images were posted on the Internet in 2004, but were likely taken in 2002 and 2003.

Interpol investigators were able to use new technology to allegedly restore the images to their original state, which they then released to the international media.

Interpol believes the photos were taken in Cambodia and Vietnam.

On Monday, after receiving hundreds of tips, Interpol announced it had identified the suspect but did not release his name. However, Thai and Cambodian police revealed the man's name, age and nationality on Tuesday.

Chao said investigators just missed capturing Neil when he entered Thailand last Thursday.

"From the reports, we understand that he came in around 3 p.m. from Seoul, South Korea where he was teaching English," said Chao. "At 8 p.m., five hours later, the Interpol blacklist came out saying that authorities should pick him up if they see him."

Chao said all of the border authorities in Southeast Asia have been alerted "so if he does try to leave Thailand at any of these border crossings, he will be caught."

Website postings

Fellow ESL teachers and expatriates in South Korea said Neil worked there as a teacher at Kwangju Foreign School.

Investigators believe Neil made frequent postings to a popular online forum called Dave's ESL Café under the pseudonym "Peter Jackson."

In one posting last May, Neil tells of a recent incident where he tossed "Penthouse" magazines at an airport fearing they'd be found by Korean customs agents.

He also explains how to erase images from computer hard drives.

"In terms of computers, if you're worried about any 'content' there are several ways to encrypt your drive. A friend has highly recommended Truecrypt, which you can download,'' he wrote.

"If you want to get rid of old files so no one will see, then simply deleting them will not work. You'll have to get a program like Jetico's BC Wipe and 'delete with wiping.'''

More than 300 postings under the name Peter Jackson were erased shortly before his disappearance, AP reported.

Work experience

On Tuesday, the Kwangju Foreign School's website listed Neil as a Grade 7-8 history teacher, with a degree from The Seminary of Christ the King in Mission, B.C. His name has since been removed from the website.

Archdiocese of Vancouver spokesperson Paul Schratz confirmed Tuesday that Neil studied at the seminar.

"He apparently left at some point when he was not invited to continue his studies for the priesthood," Schratz told CTV British Columbia.

The school's rector is quoted as saying Neil did not have the qualifications to be recommended for the priesthood.

Neil then shifted his focus to teaching and began volunteering at St. Patrick's Catholic parish six years ago.

"He at some point did some volunteer catechism instruction in the parish -- so he would be working with students, preparing them for the preparation of the sacraments, their religious education, that sort of thing," Schratz added.

B.C.'s College of Teachers says that Neil never worked in the public school system. But the Archdiocese learned that Neil taught briefly at the Archbishop Carney Regional Secondary School in Port Coquitlam last spring.

A military spokeswoman also told The Associated Press that Neil worked as a chaplain from 1998 to 2000 at an air cadet summer training centre in Nova Scotia and that his duties included spiritually advising children ages 12 to 18. No complaints were brought to commanding officers about Neil at the time.

Also Tuesday, Neil's family urged him to turn himself into police.

"I would like to say: Chris -- turn yourself in, get back into Canada. This is where you should be to answer these allegations," Neil's younger brother Matthew told reporters in Maple Ridge, B.C. on Tuesday.

Matthew Neil says the family has had no contact with Christopher Neil since he left for South Korea in August.

"Since learning of the allegations, we are absolutely devastated. The range of emotions is from anger, shock, devastation," he said.

He says the family first found out about the allegations last Thursday when RCMP officers contacted them to identify photos.