Local media is reporting two suspicious packages have been identified near to the finish line of the Boston Marathon, prompting evacuations.
A memorial service has been taking place to mark the first anniversary of the bombings.
More top news
A massive fast-moving wildfire in upstate New York has ravaged around 800 acres in forests as officials battle to contain the blaze.
Interpol has issued a global alert over the threat posed by the "diet pills" that claimed the life of a British woman.
Political leaders have launched a last-ditch attempt to win votes as the general election campaign enters its final stages.