Partial results from Monday's vote in Iowa kicking off the process to select a Democratic presidential candidate in November's election will be released at 4:00 pm (2200 GMT), US media reported. US media outlets quoted Troy Price, the chairman of the Iowa Democratic Party, as telling the campaigns in a tense conference call that about 50 percent of the results would be released later Tuesday. More than 16 hours after voters in Iowa attended caucuses on Monday evening to select a Democratic nominee the official results have yet to be released. Iowa Democratic Party officials blamed problems with an app for the embarrassing start to the Democratic presidential campaign. cl/jm