Prince Paul of Romania was detained Friday in a case of real estate fraud also involving a top aide to a former prime minister and a newspaper editor. Prosecutors said in a statement that Paul Philippe was being investigated for money laundering, illicitly obtaining assets and buying influence. He denies wrongdoing. The 67-year-old prince, the grandson of King Carol II, was questioned Friday afternoon and detained in the central city of Brasov, where the investigation is being conducted. Romania’s monarchy ended when the Communists came to power. Prosecutors said that starting from 2006, a politically connected businessman, Remus Truica, and four others used their leverage and influence to get the state to restitute land and properties to Paul while he gave them a share of the value of the real estate.