Recent discoveries of methamphetamine laboratories in Nigeria, South Africa, Kenya and Mozambique have fueled concerns that Africa is becoming a significant production hub for synthetic drugs.

In Nigeria, an operation in Ogun State led to the arrest of 10 suspects, including three Mexican nationals whom the National Drug Law Enforcement Agency (NDLEA) said had been brought into the country to help manufacture the drug. The agency’s chairman, Mohamed Buba Marwa, said officers seized more than 2.4 metric tons of methamphetamine, precursor chemicals and other materials with an estimated international market value of about $363 million.