Egyptian police say they have detained at least three people for questioning about a bombing Sunday that killed a French teenager.
Officials say the blast in a crowded Cairo market killed a 17-year-old French girl and wounded at least 24 other people.
The bomb went off Sunday outside a cafe near the Hussein mosque in Khan el-Khalili, a historic area popular with tourists.
Authorities say French, Germans, Saudis and Egyptians were among those hurt in the explosion. At least four people are in serious condition.
Officials said police found a second explosive device in the area and destroyed it with a controlled explosion.
Police did not say if they have any evidence against the detainees. No group has claimed responsibility for the explosion.
It is unclear whether foreign tourists were the target of the attack, as they have been in several deadly bombings over the past decade.
Some information for this report was provided by AFP and Reuters.