The world's biggest pharmaceutical company hired investigators to unearth evidence of corruption against the Nigerian attorney general in order to persuade him to drop legal action over a controversial drug trial involving children with meningitis, according to a leaked US embassy cable. Pfizer was sued by the Nigerian state and federal authorities, who claimed that children were harmed by a new antibiotic, Trovan, during the trial, which took place in the middle of a meningitis epidemic of unprecedented scale in Kano in the north of Nigeria in 1996. But the cable suggests that the US drug giant did not want to pay out to settle the two cases - one civil and one criminal - brought by the Nigerian federal government. The cable reports a meeting between Pfizer's country manager, Enrico Liggeri, and US officials at the Abuja embassy on 9 April 2009. It states: According to Liggeri, Pfizer had hired investigators to uncover corruption links to federal attorney general Michael Aondoakaa to expose him and put pressure on him to drop the federal cases. He said Pfizer's investigators were passing this information to local media." The cable ... continues: "A series of damaging articles detailing Aondoakaa's 'alleged' corruption ties were published in February and March. Liggeri contended that Pfizer had much more damaging information on Aondoakaa and that Aondoakaa's cronies were pressuring him to drop the suit for fear of further negative articles."