A file photo of Si Xianmin, former general manager of China Southern Airlines. [Photo: fanfu.people.com.cn]

Si Xianmin, former general manager of China Southern Airlines, is being investigated by prosecutors for allegedly accepting bribes, according to the Supreme People's Procuratorate (SPP) on Monday.

Si has been put under coercive measures, which may include summons by force, bail, residential surveillance, detention and arrest. The SPP did not specify what measures had been taken against him.