Kenya sent troops into Somalia to pursue al-Shabab, blaming it for a wave of abductions.
The incidents included the abductions of four foreign women, one of whom subsequently died.
In a chapter on alien abductions, he recounts an abduction story of his own.
Abductions are not uncommon in Venezuela, where criminals hold high-profile victims until their families pay hefty ransoms.
The report also found that migrants were sometimes used as informants to help gangs carry out abductions.
The boy's disappearance raised awareness of child abductions and led to new ways to search for missing children.
Berry and the two others had something else in common: They were teenagers at the time of their abductions.
He said MSF had no verifiable information on who was responsible for the abductions and what their motives were.
Kenya has been hit in recent years by a spate of bombings and abductions, blamed on Somalia's al-Qaeda-linked al-Shabab group.
Iran has blamed Jundallah for carrying out deadly bombings, abductions and targeted killings in the southeastern Sistan-Balochistan province, which borders Pakistan.
The boy's disappearance was thought to raise awareness of child abductions and led to new ways to search for missing children.
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No-one has admitted the abductions but the Islamist militant group, Boko Haram, has staged a series of attacks in northern Nigeria.
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Kidal, Gao and Timbuktu experienced days of looting, abductions and chaos after they were occupied by armed groups late last week.
All three spent Tuesday night behind bars, awaiting charges in the abductions.
Milisavljevic has also been convicted of 14 other murders and two abductions.
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Ms Cassez was arrested in 2005 at a ranch near Mexico City where several victims were being held, but denies knowledge of the abductions.
People who only watch local television news think that modern life is an endless series of child abductions, but the rest of us know better.
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Runaways comprise the largest number of the missing children, Best said, and while there are few abductions by strangers, those "emotional, wrenching stories" make an impact.
Kidal, Gao and Timbuktu have experienced days of looting, abductions and chaos since they were occupied by armed groups late last week, the human rights group said.
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There are negotiation consultants and security companies that specialize in abductions, as well as kidnapping insurance and plaintiff lawyers who go after the insurers when a case ends badly.
Mr. ANTHONY SHADID (The Washington Post): Well, in the beginning of the campaign, it was often former Baathist officials and suspected insurgents who were picked up in these abductions.
The United States also wants the deal to address Japan's questions about North Korea's alleged abductions of more than a dozen Japanese citizens in the 1970s and 1980s, officials said.
"Anyone with information about this individual should come forward as soon as possible, " he added, referring to Fowler's movements through the region during the time that the killings and abductions occurred.
In the hours after abductions, much hope is placed in Amber Alerts, which police use to blast out information about the victims or suspects to the public in the hope someone sees something.
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"The nature of the crime and the vulnerability of the immigrants does not allow us to know the total number of abductions, " the commission's president, Raul Plascencia, told a news conference in Mexico City.
"The Mexican authorities need to ascertain whether or not any state officials ... were complicit with the criminal organisation that carried out the abductions and extortion, both in this and other cases, " she added.
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Children abducted by relatives, runaways, and abductions by strangers are the three classifications of what came to be repackaged and rebranded by activists as "missing children" in the late 1970s and early 1980s, Best said.
Keep in mind that the Enquirer is the paper fond of splashing news of alien abductions and Elvis sightings on its sensational pages and covers designed to entice stalled grocery shoppers to take a lurid peek.
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Authorities said while the case is closed on MacMillen's death, investigations continue into the abductions and killings of other women in the same region of Canada, and the search is still on for information in those cases.
The leaders are expected to repeat a call from G8 foreign ministers urging North Korea to "fully cooperate" in the verification of its nuclear declaration and settle the issue of the country's past abductions of Japanese nationals.
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