A warning that terrorists are “very likely” to carry out attacks in Turkey has been issued by the Foreign Office.
An updated travel alert was issued on Sunday night without detailing the reason for the timing.
The revised travel advice highlighted a “heightened risk” of terrorist attack against the aviation industry in Turkey and urged travellers to fully co-operate with security officials at airports.
The Foreign, Commonwealth & Development Office said: “Terrorists are very likely to try to carry out attacks in Turkey.
“Most terrorist attacks have taken place in the south-east of the country and in Ankara and Istanbul.
“There is a potential that citizens from western countries may be targets or caught up in attacks, particularly in the major cities.
“Attacks could be indiscriminate, and occur without warning, including in places visited by foreigners, affecting public buildings, places of worship, major events or large public gatherings.
“You should be especially vigilant and where possible avoid places frequented by westerners, including diplomatic premises, places of worship, and around significant religious occasions and public holidays; terrorist groups sometimes call for attacks around these times.
“Previous methods of attack have included armed assaults, suicide bombings, car bombings, rocket attacks, arson and improvised explosive devices left in refuse bins, crowded areas, shops and on public transport.
“Be vigilant, monitor media reports and keep up to date with this travel advice.”