Prosecutors investigating charges of corruption at Siemens have questioned the company's former chief financial officer (CFO), Heinz-Joachim Neuburger. 

According to reports, Neuburger – who left Siemens in April last year – denied knowing of secret Siemens funds in foreign banks and helping to cover up irregular payments.
Neuburger is the second former executive to be questioned by prosecutors following an earlier investigation of Thomas Ganswindt, the former chief of Siemens' fixed-line communications unit.
Ganswindt and five other current and former Siemens employees are accused of committing breach of trust against the company by setting up secret funds outside Germany.
Siemens has stated that its own internal investigations have uncovered questionable payments to the tune of $545-million.
Swiss and Italian authorities, who are conducting their own investigations, say they suspect the secret funds were used to pay bribes for lucrative foreign contracts.