LONDON - London mayor Sadiq Khan said an attack in central London late on Saturday was a 'deliberate and cowardly attack,' and that he would take part in a security meeting with UK Prime Minister Theresa May later on Sunday. 'We don't yet know the full details, but this was a deliberate and cowardly attack on innocent Londoners and visitors,' Khan said. 'I condemn it in the strongest possible terms. There is no justification whatsoever for such barbaric acts,' he added.