A roadside bomb hit a tourist bus on Friday in an area near the Giza Pyramids in Egypt, killing two Vietnamese tourists and wounding 12 others, Egypt's Interior Ministry said in a statement.

It said the bus -- carrying 14 Vietnamese tourists -- was traveling in the Marioutiyah area near the pyramids when the crude roadside bomb, concealed by a wall, went off. The wounded included 10 Vietnamese tourists, as well as the Egyptian bus driver and the guide.

Egypt has battled Islamic militants for years in the Sinai Peninsula in an insurgency that has occasionally spilled over to the mainland, hitting minority Christians or tourists.

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This was the first attack to target foreign tourists in almost two years.

The attack took place as Egypt's vital tourism industry has showed signs of recovery after years in the doldrums because of the political turmoil and violence that followed a 2011 uprising that toppled former leader Hosni Mubarak. On Friday, as many as 2,500 tourists visited one tourist site in southern Egypt -- the Abu Simbel Temple, the head of the Abu Simbel Antiquities Department said, Egypt's MENA news agency reported.

The bombing will likely prompt authorities to further tighten security around churches and associated facilities ahead of the New Year's Eve celebrations and next month's Christmas celebrations of the Coptic Orthodox Church, the dominant denomination among Egypt's estimated 10 million Christians.

Over the past two years, militant attacks against Christians in Egypt -- usually targeting churches or buses carrying pilgrims to remote desert monasteries -- have killed over 100 people.