Travellers from the US have been warned not to travel to Egypt amid rising tension across the country.

The declaration from the US state department came on Saturday after at least five people, including an American, died in clashes between supporters and opponents of president Mohammed Morsi.

US nationals in Egypt have also been urged to “remain alert” amid mass protests across the country as Morsi marked his first year in office yesterday (Sunday).

On Sunday Cairo’s Tahrir Square saw the biggest demonstration since the 2011 revolution which ousted former president Hosni Mubarak.

The Foreign & Commonwealth office updated its travel advice yesterday with an alert about rallies in the tourist destinations of Sharm el Sheikh, Luxor and Hurghada in addition to Cairo and Alexandria.

“The atmosphere of these demonstrations can change quickly and without warning.” The FCO said.

“Reports suggest that a few of those attending are armed and that arrests have been made of people intending to cause violence.

“A US citizen was killed in demonstrations in Alexandria on Friday. Press reporting suggests that he was stabbed after being seen to be filming the demonstration.

“Other press reporting suggests that some of those demonstrating in Tahrir Square and elsewhere are hostile and suspicious of any foreigners present. If you become aware of any nearby protests, leave the area immediately.”