Authorities in the US state of Connecticut are investigating a possible threat against President Obama, according to local media reports.
A statement from the US Secret Service, which oversees the President's personal security, said: "Information has been received by law enforcement regarding a potentially suspicious person and vehicle. We are working with our local law enforcement partners to determine the validity of the information provided."
A local newspaper said state police were looking for a man who had allegedly made a threat against Obama.
He was believed to have been driving a car with Connecticut licence plates.
Obama was making a number of fundraising appearances in the north-east of the country on Friday.
More top news
The M20 in Kent is shut between junctions 10 and 9 of the Londonbound carriageway near Ashford. A body was found there last night.
In a night of violence in Camden, two young men have lost their lives as knife crime continues to haunt the capital.
The profit hike comes despite a mammoth £1.7 billion hit from the payment protection insurance (PPI) mis-selling scandal last year.