The UK’s Foreign and Commonwealth Office (FCO) has extended the state of emergency in Tunisia for the summer.
A further four months has been added to the timeframe, which runs until the middle of October.
The state of emergency was first declared in November 2015 after a suicide attack on a police bus.
But the FCO was already advising Britons against all but essential travel to the traditional holiday resort.
This was prompted by a terror attack in Sousse two years ago, when 30 British holidaymakers were killed after a gunman opened fire on a beach.
While the state of emergency remains in place, the FCO has maintained its warning against travelling to the nation.
Britons are advised against all travel to the Chaambi Mountain National Park area; the Tunisia-Algeria border crossing points at Ghardimaou, Hazoua and Sakiet Sidi Youssef; the militarised zone south of, but not including, the towns of El Borma and Dhehiba; and within 5km of the Libya border area from north of Dhehiba up to but not including the Ras Ajdir border crossing.
The FCO is also advising against all but essential travel to the rest of Tunisia.
Its official travel advice said: “Terrorists are very likely to try to carry out attacks in Tunisia.
“Security forces remain on a high state of alert in Tunis and other places.
“You should be vigilant at all times, including around religious sites and festivals.
“Follow the advice of the Tunisian security authorities and your travel company, if you have one.”
There are currently no direct flights between the UK and Monastir or Enfidah airports in Tunisia.
The UK government is working closely with authorities in the North African country to monitor the terror threat.
Tunisia’s state of emergency was last updated by the FCO in February this year.
The country’s ambassador to the UK, Nabil Ammar, made a desperate plea for the travel ban to be lifted in May last year as the country saw plunging tourist numbers.
