Toronto, Aug 12 - In a rather sweeping advisory to its citizens travelling in India, the Canadian foreign office says terror attacks, bomb blasts and violence can happen at any place, at any time in the country.

According to it, bombings occur throughout India and it is not safe for foreign travellers as violence can happen any time.

Hoisting the danger signal for its citizens travelling to India, the foreign office has told them to be particularly vigilant before the country's independence day later this week.

They should exercise caution in the lead up to the Aug 15 celebrations 'as militants have used such occasions to mount attacks in the past', the advisory says.

'Canadians are strongly encouraged to maintain a high level of vigilance, remain aware of their surroundings, monitor local news reports, follow the advice of local authorities, avoid crowded places, and take appropriate steps to increase their personal security,' it adds.

The advisory says though Mumbai 'is beginning to return to a semblance of normality' after the November terror attack, terrorism threat is always high in India, including places frequented by foreign visitors and expatriates.

Warning the Canadians against non-essential travel to north-eastern states and no travel at all to Jammu and Kashmir and other border areas, it says: 'Terrorist violence, such as bombings in public areas and on public transportation, occurs throughout India.

'Public trains and buses are always potential targets. Exercise caution when travelling throughout India, particularly when visiting tourist sites, government installations or attending public events such as cultural festivals.