A recent report in the Wall Street Journal details the bust of a VoIP toll fraud ring in The Phillipines. According to the WSJ article:
A federal grand jury in New Jersey indicted three people Friday, including one man who has been linked to al Qaeda. The three suspects, who live in the Philippines, are accused of providing Pakistani nationals in Italy with access to stolen phone lines.
The same company that was used to pay the three hackers also financed the communications of terrorists in last year’s Mumbai attacks, in which a small group killed more than 170 people, people familiar with the matter alleged.
The group is alleged to be responsible for stealing 12 million minutes of phone service estimated to be worth $55 million.