Police have urged the public to remain vigilant at the London Marathon on Sunday in light of an alleged terror plot in Australia.
Scotland Yard said there was "no information to suggest a specific threat" but urged people to keep alert at event in central London this weekend, which also include Anzac Day commemorations.
Earlier this week, five teenagers were arrested in Australia in connection with an alleged plot to mount an Islamic State-inspired attack on police and the Anzac remembrance ceremony on Saturday.
In a separate development, today a 14-year-old boy appeared in court accused of inciting atrocities including a beheading plot at Anzac commemorations in Melbourne.
Ahead of Sunday's London Marathon, Metropolitan Police Deputy Assistant Commissioner Neil Basu, said: "In light of recent alleged plans to attack Anzac Day events and police officers overseas - we are reminding the public to be vigilant.
"While there is no information to suggest a specific threat to these events in the UK - and the current national threat level remains unchanged - we would like to reiterate our long-standing advice to remain vigilant and alert.
"As ever we would urge the public to get in touch to report anything suspicious by calling the confidential anti-terrorist hotline on 0800 789 321 or in an emergency by calling 999."
"We would like to reassure the public that police forces have reviewed security plans for this weekend's events to ensure they are safe and secure for all those attending or involved, and that the public are encouraged to continue with their plans to attend or take part in these great events."
Hundreds of thousands of spectators are expected to turn for the 26-mile race which sees runners pass many London landmarks.
And tomorrow thousands will gather at the Cenotaph in Whitehall to mark Anzac Day, which commemorates the Australians and New Zealanders who served and died in the Armed Forces.
Observed on April 25 every year, it initially began as a way of remembering those who fought at Gallipolli against the Ottoman Empire during the First World War.
