At least four people, including three Koreans, were killed Sunday after an explosion ripped through a tourist bus near a border crossing between Egypt and Israel.
South Korea's Foreign Ministry confirmed that a Korean tourist, two Korean tour guides and an Egyptian bus driver were killed in the explosion, while 12 tourists were wounded and are being treated at a nearby hospital.
Fifteen survivors have crossed the border into Israel, accompanied by a South Korean embassy staff member.
The bus was carrying 35 people, who were waiting to cross the border to Israel after spending a night at Sinai, when an armed man -- suspected to be in his 20s -- threw a bomb at the bus.
The Korean tourist group was reportedly on a 12-day pilgrimage that included stops in Turkey, Egypt and Israel.
The Egyptian government has declared the incident a terrorist attack and is investigating the case.
The Israeli newspaper the Times of Israel reported Monday that an Al-Qaeda-linked Islamist group has taken responsibility for the bombing on its Twitter account, promising to continue attacks on Egypt's economy, tourism and military.
Once a popular tourist destination, Sinai has been rocked by several attacks since the army ousted President Mohamed Morsi last July.
Korea's foreign ministry dispatched a delegation to Egypt on Monday morning and they will join officials from the Korean embassies in Egypt and Israel at the site of the attack.
The ministry also set up a task force and held an emergency meeting shortly after the incident was reported to come up with countermeasures.
The ministry has issued a special travel warning for Egypt, practically banning Koreans from visiting the region, and has asked Koreans traveling in Egypt and its four neighboring countries -- Israel, Jordan, Turkey and Saudi Arabia -- to return as soon as possible.
Hwang Sung-hee, Arirang News.