Bill Cooke of NASA's Meteoroid Environmental Office said the widely-reported flash in the sky was probably "a single meteor event." He told the Associated Press:
[It] looks to be a fireball that moved roughly toward the South East, going on visual reports.
Judging from the brightness, we're dealing with something as bright as the full moon.
The thing is probably a yard across. We basically have [had] a boulder enter the atmosphere over the North East.
More top news
Police are hunting four men who smashed their way into a jewellers in broad daylight and threatened staff with sledgehammers.
ComRes polling agency chairman says the next 100 days will be be gruelling in the most uncertain General Election that anyone can remember.
Pictures taken 70 years after the liberation of the Nazis' Auschwitz death camp echo the horrors of its Holocaust past.