The London Marathon is to go ahead this Sunday in the wake of the blasts at the Boston Marathon yesterday.

‘This is one of those instances where the best way to show solidarity with Boston is to continue,’ sports minister Hugh Robertson confirmed to the BBC, hours after two fatal explosions at the finish line killed three people at the Boston event. Over 100 were injured.

Around 36,000 runners are expected to take part in the London race, which starts in Blackheath and finishes near Buckingham Palace.

London Marathon chief executive Nick Bitel said in a statement: ‘We are deeply saddened and shocked by the news from Boston.

‘Our immediate thoughts are with the people there and their families. It is a very sad day for athletics and for our friends and colleagues in marathon running.’

A full security review will take place, the Metropolitan Police have confirmed.

Efforts to find out what happened in Boston are continuing, as the FBI taking launched a 'potential terrorist enquiry'. In a national address, President Barack Obama promised ‘justice’.

‘We will find out who did this. We'll find out why they did this. Any responsible individuals, any responsible groups, will feel the full weight of justice,’ he said in a public statement last night.