Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Ex-Hostage: Aid Worker Kidnappings 'Big Business' as Criminals Wade In Reuters Kidnapping of aid workers has become "big business" as militants often work with crime networks to carry out abductions, a senior United Nations official and former hostage said on Tuesday. Vincent Cochetel, who was held captive in Chechnya in 1998, said countries must bring kidnappers to justice to stem a steep increase in attacks, which are undermining aid operations. "We need to absolutely get the perpetrators to court," Cochetel, who works for the U.N. refugee agency (UNHCR), told the Thomson Reuters Foundation, adding that it was usually possible to trace many of those involved. "These people can be tried any time, anywhere, and they can be extradited, so it's important to make sure that when those individuals are known everything is done to bring them to justice." Last year 130 aid workers were abducted, up from 45 in 2007, according to the Aid Worker Security Database, which records attacks on aid workers. High-risk countries included Afghanistan, the Democratic Republic of Congo and South Sudan. Kidnapping is a longstanding problem in Afghanistan, either for ransom or to put pressure on Western governments, while rebels in South Sudan have carried out mass abductions of humanitarian convoys to control aid delivery. Most kidnap victims are national staff, held on average for 12 days, according to database research in 2013. International staff are usually held for longer as demands for money or concessions are often steeper. .