The Federal Bureau of Investigation has said that hundreds of people have contacted its agents about paedophile teacher William Vahey, who is suspected of drugging and molesting boys over a forty-year period, the Associated Press has reported.
The US Bureau has said that it has now "been contacted by several hundred individuals from around the globe."
Vahey killed himself at age 64 after evidence of child molestation was found on one of his memory drives.
The Government is not going far enough or fast enough to prevent online child abuse, the shadow crime and security minister has said, after David Cameron announced that he wanted to close the loopholes that allows sexual predators to produce "manuals" giving tips on grooming victims.
Diana Johnson said in a statement: “It is absolutely right that these 'manuals' are to be banned, but the fact that online guides for abusing children are currently legal shows how ill-suited current legislation is for protecting children online.
"The Prime Minister promised to make online restrictions equivalent to off-line restrictions but he has not come close to implementing this."
Children's charity NSPCC welcomed the Government's new measures to crackdown on child sex abuse online, but said that police needed to be given more powers to "infiltrate and disrupt" offenders.
A new law to tackle child abuse is expected to be in force by the time of the general election next year, and could be implemented in an amendment to the Obscene Publications Act 1959, according to the newspaper.
The Terrorism Act 2000 outlawed terrorist training manuals.
The move was announced after it emerged that a paedophile teacher drugged and abused up to 60 boys as young as 10 at a British private school.
William Vahey, who taught history and geography at Southbank International School in London between 2009 and 2013, committed suicide last month as FBI agents closed in.
Paedophiles will get the same treatment as terrorists in a crackdown on child abuse to be included in the Queen's Speech. David Cameron wants close a loophole that allows sexual predators to produce "manuals" giving tips on grooming victims.
The issue came to light after GCHQ and the National Crime Agency found online examples of the guides in the chaotic part of cyberspace known as the "dark web".
The Prime Minister told the Sunday Times (£): "It's completely unacceptable that there is a loophole in the law which allows paedohpiles to write a distribute these disgusting documents."I want to ensure we do everything we can to protect children - and that's why I am making them illegal."
Out of the 708 paedophiles who have been unmasked using powers under the Sarah's Law scheme in England and Wales, Avon and Somerset Police recorded 42 disclosures, followed by Devon and Cornwall with 39, Thames Valley with 36 and Norfolk with 33.
A total of 49 identities have been released in Scotland.
Charities and campaigners have expressed concern that only one in seven applications of paedophiles being identified have resulted in a disclosure and raised questions over how well the scheme is being publicised in the face of waning numbers of applications.
However, other groups said the figures highlighted a "worrying shift of responsibility" away from the state and onto ordinary members of the public in dealing with sex offenders.
Donald Findlater, director of research and development at Lucy Faithfull Foundation, said:
More than 700 paedophiles have been unmasked using powers under Sarah's Law since it was rolled out nationwide.
Figures released to the Press Association show, on average, around five child sex offenders have been identified to worried parents and guardians every week since April 2011 when the scheme was launched across the country.
And police forces in England, Wales and Scotland have received 4,754 applications from anxious parents and guardians who want to know whether people who have contact with children pose a risk - meaning just one in seven result in a disclosure.
However, applications have fallen since the scheme was launched, from 1,944 in 2011/2012 to 1,106 so far in 2013/2014, while disclosures have also declined from 281 in the first year to 122 in current year to April.
David Bryant, a paedophile who sexually abused four little girls in the 1980s and 1990s has been jailed for 17 years.