The Mayor of London said there will be more police on the streets in London today after a suicide bomber killed at least 22 people and wounded 59 at a pop concert by US singer Ariana Grande in Manchester last night.

Sadiq Khan said in a statement posted on Twitter: “London stands united with the great city of Manchester today after this barbaric and sickening attack.

“This was a cowardly act of terrorism that targeted a concert attended by thousands of children and young people.

“My heart goes out to the victims, their families and everybody affected. Once again we have seen the heroism of our brave emergency services. They have our full support and are in all our thoughts today.

“I am in constant contact with the Metropolitan Police, who are reviewing security arrangements in London. Londoners will see more police on our streets today.

“Manchester and the rest of Britain will never be cowed by terrorism. Those who want to destroy our way of life and divide us will never succeed.”