LONDON, May 15 (Reuters) - Britain's National Crime Agency said it had not seen a second round of ransomware cyber attacks on Monday as experts had feared after 150 countries were hit last week, but added it could not rule out further disruption.
Britain's state-run National Health Service was among organisations across the world to be affected by the WannaCry worm, which struck on Friday and locked up hundreds of thousands of computers in factories, shops and schools.
There had been concerns of a second wave as employees turned on their computers and checked e-mails as they returned to work on Monday.
"We haven't seen a second spike in #WannaCry #ransomware attacks, but that doesn't mean there won't be one," the NCA, which tackles serious and organised crime in Britain, said on Twitter. (Reporting by Michael Holden, editing by Elizabeth Piper)