The Vietnamese tourists and a local tour guide have been killed after a roadside bomb hit a bus near the Giza pyramids in Egypt.
Eleven others were injured in the incident, the first affecting foreign tourists in Egypt in more than a year.
Prime Minister Mostafa Madbouly said ‘‘the bus had deviated from its planned route without alerting security forces, although the driver denied this.”
No group has yet said it was behind the blast.
Islamist militants have targeted tourists in the past.