Dr. Jacques H. Smits, the specialist Criminologist and `child tracker' now in Guyana with the mother of the two abducted children, Ms. Aneta Joanna Szadkowska, 30, said they yesterday continued the search in Corriverton in Berbice in the eastern part of Guyana before moving to Linden, some 60 miles south of Georgetown in the afternoon.

Smits, who is being helped in the search by detectives from the Criminal Investigations Department here, told the Chronicle that Immigration authorities at the Cheddi Jagan International Airport and on the borders have been alerted about the abduction of the children and are on the lookout for the alleged kidnapper Herman Roelf Ploeger.

Ploger, 34, a Dutch national, allegedly fled the Netherlands a year ago with his two children even though he lost parental custody on four separate occasions during a bitter divorce in his country's court system, Smits told the Chronicle.

He yesterday said he has been advised that Ploger has been changing his modus operandi, disguising himself as he moves around.

Smits said the kidnapper is believed to be posing as a woman to avoid detection.

The criminologist said that news of the abduction has spread with the front page story in last Sunday's Chronicle and "people everywhere we have been have told us that they read about it in the newspaper."

After no firm leads in Corriverton yesterday, Smits said they travelled to the bauxite mining of Linden yesterday to brief Police there on the case.

He said he has been assured that Police are on the lookout for the alleged abductor and the two boys at the airport and on the borders with Suriname, Brazil and Venezuela.

The abduction case has attracted the attention of the mainstream media in the Netherlands and law enforcement agencies in several countries, he said.

Smits, who has been on the case for some nine months now, said he has conducted investigations and searches in countries such as Spain, Belgium, Germany and Italy for Ploeger who is wanted by the Dutch Police, by the Venezuelan law enforcement agency and by Interpol (the international Police organisation) worldwide for "international child abduction".

The kidnapped children are Timotheus Witold Ploeger who was born at Enschende, Netherlands on December 27, 1997 and Pascal Roelf Ploeger, born at Assen, Netherlands on June 16, 1999. Their parents, Szadkowska (a Polish national) and Ploeger were married on October 3, 1997 in the Netherlands where they settled and lived together for about three years, Smits said.

They officially divorced on September 12, 2000 with the court awarding Szadkowska custody of the two children on four separate occasions, the last time by the Supreme Court in Holland, he said.

Szadkowska told the Chronicle that her ex-husband lost custody of the kids all four times.

The last time Szadkowska saw her two children was on June 24, 2001 when Ploeger kidnapped and disappeared with the kids.

Smits said he eventually tracked the wanted man to Margarita, a tourist island off the Venezuela coast in September last year. Ploeger, however, managed to escape with the kids after he allegedly "paid off" some people there.

Smits said that while in Margarita Island, Ploeger reportedly told the children - and others he met on the island - that their mother (Szadkowska) died of cancer last year.

"This is not true. The mother is in perfect health and wants her children back more than anything," Smits told the Chronicle in the presence of Szadkowska, who is not as fluent in English as she is in Dutch and Polish.

Ploeger was born in Winschoten, Netherlands on August 6, 1968. His passport number is N88022744 and his Social Security Number is 110933084, Smits said.

He, however, noted that Ploeger may be using "forged and falsified documents" for travelling.

According to Smits, intelligence reports gathered so far indicate that Ploeger fled Margarita Island and went to Caracas, Venezuela where he stayed a while. He subsequently took a flight from Caracas and arrived in Guyana on November 28 last year with the two children.

Smits said Ploeger was spotted in Guyana last Wednesday. "We don't know the exact house but we know the area," he told the Chronicle.

"Everybody can run from me but not hide," the Criminologist asserted Sunday with some degree of confidence.