British police said on Sunday that they have made a second arrest in connection with the bombing of a London Underground train, as their probe into the terror attack widened.

A London terror attack claimed by the Islamic State group leaves seven people dead and 48 wounded after men mows down and stabbed revellers. It is the latest in a deadly series of strikes linked to radical Islamists against European targets in the last two years.

British police investigating Saturday's attacks in London have detained a "number of people" after entering two properties in early morning raids in the east of the city.

Australian cricket's governing body say they are satisfied with security ahead of their Champions Trophy match with Bangladesh on Monday in London.

World leaders have united in condemnation of a suspected terrorist attack in London, which left at least four people dead and 40 others injured.