[allAfrica] Cape Town — Britain’s National Crime Agency (NCA) has arrested Romy Andrianarisoa, the Madagascan president’s chief of staff, after allegedly soliciting a bribe from global gemstone supplier Gemfields, Reuters reports. Andrianarisoa, along with her French associate Philippe Tabuteau, were summarily detained in London. The pair sought an upfront payment of U.S.$286,000, along with a 5% equity stake, the NCA said.