According to information provided by UNODC, the significant volume of amphetamine-type stimulants seized in West Africa over the past year may indicate an increase in the illicit manufacturing of and trafficking in amphetamine-type stimulants, in particular methamphetamine. A total of 10 clandestine methamphetamine laboratories were dismantled in Nigeria between 2011 and July 2015. In May 2015, Nigerian authorities dismantled two facilities used for the illicit manufacture of methamphetamine in Anambra State. Between January and July 2015, Nigerian authorities effected four seizures of methamphetamine, totalling approximately 92 kg, at the international airport near Lagos.