Thomas Cook has halted excursions to a historic site on the Sinai Peninsula following a fatal bomb attack on Sunday.

The operator said it had stopped offering excursions from Sharm-el Sheikh to St Catherine’s Monastery after three South Korean tourists were killed in a blast while returning from the site by bus.

The Daily Telegraph reported that Cook had halted the excursions as a precaution, but had also insisted that customers in resort were not affected.

“Our experienced team on the ground has again assured us that our customers in Sharm el Sheikh and Hurghada are enjoying their holidays,” a spokesman told the Telegraph.

“We continue to monitor the situation in Egypt and are in regular contact with the Foreign Office. Currently the Foreign Office does not see any risk of travel to the Red Sea resorts and we are happy to report that we continue to operate our flight and holiday programme as normal.”

The attack occurred on Sunday as the tourist bus was waiting near a border crossing with Israel, officials said.

Egypt’s Minister of Tourism Hisham Zaazou said the Egyptian government had taken the “utmost measures” to protect tourists in the country.