"Indian travellers would be aware of recent disturbances in some parts of the United Kingdom. The High Commission of India in London is closely monitoring the situation," reads the message entitled 'Advisory for Indian Citizens Visiting the UK.'
Scotland Yard said that they are in the early stages of dealing with an incident at the London Bridge.
They're not reporting it, they're absolutely not reporting it and that's a big problem," Trump told ITV, a day after explosions rocked the Belgian capital, claiming over 30 lives and injuring more than 250.
A lone attacker, believed to be a Libyan refugee, went on a stabbing spree in a busy park in the southern English city of Reading, killing three people and injuring three others, the deadliest terrorist incident to strike Britain since 2017 London Bridge attack.
Police have identified the suspect as 28-year-old Usman Khan, inspired by the ideology of Al Qaeda terror group, was previously sentenced to 16 years in prison term for his role in the London Stock Exchange bombing in 1990.
The 29-year-old, who has studied electrical engineering in Sudan, lived in Birmingham's Sparkhill district. He describes himself as a shop manager.
Scotland Yard also conceded that they may "never understand" the 52-year-old attacker's motive.
Earlier, an 18-year-old man was arrested in the port area of Dover. None of the suspects have been named.
'The person who carried out the London attack... was a fighter from the Islamic State, and did so in response to calls to target citizens of coalition countries,' the ISIS statement read.
The Scotland Yard's Indian-origin deputy assistant commissioner, Neil Basu, in a statement said Khalid Masood's attack had echoes of the rhetoric of the Islamic State but no evidence at this stage suggests he was linked to the group.
The incident took place at the Parsons Green station, which has been closed.
Two people at the scene were treated for injuries after the vehicle crashed into the large steel barriers erected around the Houses of Parliament complex.
British Prime Minister Theresa May said military personnel would replace armed police "on guard duties at certain protected sites which are not accessible to the public".
The police is investigating whether it was 'accidental or deliberate'.