LONDON, April 16 (Reuters) – The London Marathon will go ahead as planned in the British capital this Sunday despite the bomb attack on the Boston race which killed three people and wounded more than 100, police and officials said on Tuesday.

Sports Minister Hugh Roberston said he was confident of security arrangements for the London event and encouraged people to attend as a show of solidarity with the U.S. city.

“In security terms, we are as confident as we possibly can be that we can deliver a safe and secure marathon,” Robertson said in an interview on the BBC and Sky TV.

The 26-mile (42 km) London Marathon will attract 36,000 runners, among them Britain’s double Olympic champion Mo Farah, starting at Greenwich Park and winding through city landmarks before finishing at the Mall.

London Mayor Boris Johnson told reporters while on a visit to Dubai: “Obviously what happened in Boston was shocking and horrific and our thoughts are very much with the victims and their families.”

The Boston blasts detonated close to spectators standing behind roadside barriers. The two explosions were about 50 to 100 yards (meters) apart as runners crossed the finish line.

The incident evoked memories of the Sept. 11, 2001, attacks on the United States although no one has claimed responsibility and a political motive has not yet been determined.

Robertson said the British police and military had great experience in guarding big events.

“The best way of dealing with this is to get out on the streets, is to show solidarity with the people in Boston, to celebrate a fantastic marathon and send out a very clear message to those responsible that we won’t be cowed by this kind of behavior,” he said.

THATCHER FUNERAL

Metropolitan Police chief Superintendent Julia Pendry said the force was reviewing its security arrangements in liaison with race organizers.

London police will also mount a large security operation for the funeral of former Prime Minister Margaret Thatcher on Wednesday.

Mayor Johnson said he had talked to the London police commissioner about both events.

“We have got the funeral and then obviously we have got the marathon at the weekend…clearly we will be calling on the public to be vigilant and maybe there will be some intensified search operation but certainly we will be proceeding as normal,” he said.

The London race was first run in 1981 and has become a centerpiece of the sporting calendar in Britain with elite athletes joined by the vast number of amateur runners who compete to raise money for charity.

Hundreds of thousands of people line the course with music and food stalls adding to the party atmosphere.

London Marathon Chief Executive Nick Bitel said he was saddened and shocked by the bloodshed in 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,” Bitel said.

In Germany, Hamburg’s annual marathon will go ahead as planned on Sunday after German police and security officials said they saw no increased risk for the event, organizers said.