Premise: LONDON (Reuters) - 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 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.
Hypothesis: Sadiq Khan responded to the attack on Sunday.