Police in the US say there is “insufficient evidence” to charge three men who were allegedly planning to assassinate Barack Obama.
The men were arrested in Denver, Colorado, in connection with drugs and weapons offences.
Sky News political editor Adam Boulton, in Denver, said one of the group is reported to have made comments alerting police to a potential assassination plot against the leader of the Democrats.
(Article continues below)
But speaking at a press conference, police said the men were drug addicts.
They said they were keeping an open mind about the investigation.
US Attorney Troy Eid said: “There is insufficient evidence that there was any kind of a plot or a threat but we’ll keep an open mind as we look.