President Obama has described the situation in Ottawa as "tragic" after an attack left a soldier dead.
Mr Obama said: "Just two days ago a soldier was killed in an attack...we now know a young man was killed today.
"We don't yet have all the information on what motivated the shooting, if this was the work of a broader network or plan or an individual that chose to take these actions."
He added: "I've very familiar with that area and I'm reminded of how warmly I was received and I'm obviously very shaken by it."
President Obama said he was "mortified" after a man walked up to him at a polling station and warned him not to touch his girlfriend.Read the full story ›
US President Barack Obama has revealed he recently had his credit card declined at a New York restaurant.
According to NBC News, Mr Obama recounted the incident while signing an executive order to protect consumers from fraud.
"It turned out, I guess, I don't use it enough to so they thought there was some fraud going on," Mr Obama said.
The president's meal was still paid for without any emergency action, thanks to the First Lady.
"Fortunately, Michelle had (her card)," Mr Obama explained.
President Barack Obama has been briefed by US Centers for Disease Control (CDC) director Tom Frieden and senior members of his administration about the second case of Ebola in Dallas.
Obama stressed that "lessons learned" from the CDC's investigation should be shared with hospitals and healthcare workers across the country, the White House said.
President Obama has demanded immediate action to ensure that hospitals and health workers follow the correct protocol when dealing with potential Ebola cases.
It follows confirmation that a female health worker who treated a male Ebola patient in Dallas, Texas has contracted the virus.
ITV News Washington Correspondent Robert Moore reports:
US President Barack Obama has called for "immediate additional steps to ensure hospitals and healthcare providers nationwide are prepared to follow the protocols should they encounter an Ebola patient"..
Earlier, the president was briefed on the second patient to be infected with Ebola in Dallas, Texas.
Hr also called for an investigation into how a female health worker was infected with the virus to move as quickly as possible.
President Barack Obama has responded to the murder of Alan Henning, vowing to continue to take action to "degrade and ultimately destroy" militant group Islamic State.
"Standing together with our UK friends and allies, we will work to bring the perpetrators of Alan's murder - as well as the murders of Jim Foley, Steven Sotloff and David Haines - to justice," he said.
"Standing together with a broad coalition of allies and partners, we will continue taking decisive action to degrade and ultimately destroy Isil."
President Barack Obama has said the US "strongly condemns the brutal murder" of British aid worker Alan Henning by Islamic State militants.
He said Mr Henning's death was a "great loss" for both his family and the British people.
ITV News Washington Correspondent John Ray has the latest developments:
White House 'strongly condemns the brutal murder of Alan Henning. He worked to help improve the lives of the Syrian people.....
.... his death is a great loss for them, for his family and the people of the United Kingdom. '
A video showing the US President saluting servicemen with a coffee cup in hand has prompted outrage on social media.Read the full story ›