Phan Van Anh Vu, a real estate developer wanted by Vietnamese authorities amid a crackdown on corruption has been detained in Singapore, lawyers representing him said on Tuesday. Vietnam’s crackdown on high level corruption has led to the arrest of dozens of officials from state oil firm PetroVietnam and the banking sector. The Communist country is stepping up a crackdown on corruption among its numerous state-owned enterprises to ensure graft doesn’t spoil the economic miracle, analysts say.