"The people bought tickets for the trip beyond a contract with a tour operator or a travel agency, so they will not be entitled to demand compensation from tour operators," Irina Tyurina told the Moscow-based Ekho Moskvy radio Saturday.
On Thursday, Tyurina said the tickets had been bought not in an official tour operator's office in a hotel, but in a local "street" agency.
Police said Friday a total of six Russian nationals were among nine people who died on Thursday after a bus carrying foreign tourists overturned and caught fire in Egypt's Sinai Peninsula.
Earlier local officials confirmed that three citizens from Ukraine, Romania and Egypt had died. Some 28 others, including 16 Russians, four Egyptians, two Canadians, two Italians, two Romanians, a Briton and a Ukrainian, were injured in the accident.
The vehicle, carrying 37 tourists from the popular tourist resort of Sharm el-Sheikh to the Egyptian capital, Cairo, hit a sharp bend on a desert highway at Abu Zenima, about 40 miles (65 kms) southeast of the Suez Canal.
Most passengers were asleep when the accident occurred.
A special commission has been established to investigate the circumstances of the accident, which some media sources reported was due to a burst tire.
Such incidents are frequent on Egyptian roads due to a combination of speeding and the poor condition of the roads. Some 8,000 people die annually each year in the country in road accidents.
Egypt is a popular tourist destination among Russians with some 1.5 million people visiting the country from Russia last year.
