TEHRAN, Iran - An Iranian news website says the son of a prominent conservative who ran against President Mahmoud Ahmadinejad in 2009 has died in a hotel in Dubai in a suspicious way.

The Sunday report by the website Tabnak, close to conservative Mohsen Rezaei, says that the politician's son Ahmad Rezaei died in the Gulf city's Gloria Hotel. It provided no details.

Prior to his return to Iran in 2005, Ahmad Rezaei had lived in the United States and openly criticized Tehran's rulers. This put his father, a conservative closely associated with clerical hardliners, in an awkward political position.

Mohsen Rezaei is secretary of Iran's powerful Expediency Council, an advisory body to Iran's Supreme Leader, Ayatollah Ali Khamenei.