Three suspects were arrested Monday in connection with a bomb attack at a landmark Cairo bazaar, which killed a 17-year-old French girl on a school trip and wounded at least a dozen other students.
A police official told AFP the three were arrested on the scene and about 15 others were being questions.
Sunday night's explosion from a homemade bomb raised worries in Egypt of wider damage to the country's vital tourism industry, which is already suffering from the global economic meltdown.
The blast went off in the busy main square of the sprawling Khan el-Khalili market, which was packed with tourists and Egyptians — including the tour of more than 40 high school students from the Paris suburb of Levallois-Perret.
"This act highlights social and political unease but appears to be the work of an individual or a group acting in isolation," said Amr Shubaki, a researcher at the Al-Ahram centre of strategic studies told AFP.
The Associated Press contributed to this report.