The United States said it could not confirm reports that Ukraine had disabled vehicles in a Russian convoy inside Ukraine and warned Moscow that any intervention into Ukraine without Kiev's permission was unacceptable.
"Even as we work to gather information, we reiterate our concern about repeated Russian and Russian-supported incursions into Ukraine," White House spokeswoman Caitlin Hayden said in a statement.
More top news
In his first major speech this year, Mark Carney said the falling currency will eventually weigh on wages and consumer spending.
Cloudy skies limiting the sunshine
International Great Britain triathlete Eleanor Penrose was taken to an A&E department twice in the space of 24 hours in August 2015.