VIENNA (AP) — The Iranian government wants assurances that economic incentives that were part of a landmark deal to stop the country developing nuclear weapons will be protected, despite the U.S. withdrawal and threat of sanctions against companies who trade with Iran. A senior Iranian official says Tehran expects European Union countries to put forward concrete solutions by the end of May to keep the 2015 Vienna accord alive. The official briefed a small group of reporters on condition of anonymity ahead of talks Friday in the Austrian capital. He said failure to find a solution could prompt Iran to resume its nuclear program. The meeting between Iran, Britain, France, Germany, China and Russia comes after the U.N.