However, while Irish holidaymakers are being urged to completely avoid certain countries, including the former tourist haven of Bali, the department has not advised against all non-essential visits to Egypt.

There have been two cases of terrorism in Egyptian tourist resorts over the past week, resulting in the deaths of almost 30 people. These follow on from a series of bomb attacks on tourist resorts last year.

Amongst other countries said to be under a "constant threat of terrorism" is India, particularly in the north-eastern areas of the country, which experience "lawlessness and violence".

In the latest travel advice updates, holidaymakers hoping to enjoy a trip to eastern Europe are strongly urged to take out comprehensive travel insurance. This warning is also issued to holidaymakers looking forward to ski breaks in countries such as Andorra.

Visitors to the Czech Republic are warned about bogus plain-clothes policemen asking to see their wallet and personal documents. Police officers in the Czech Republic do not have the right to check money or its authenticity.

Poor road safety is highlighted as a major problem in Poland, with driving standards and roads being of a "poor standard". Pickpocketing on public transport to and from Warsaw airport is also a problem.

Visitors to Canada, often regarded as an extremely safe country, are also warned against "pick-pocketing and theft of personal possessions".