UPDATED: Bomb Blasts in Cairo

23 February, 6 a.m.: Casualty figures have been revised at 1 dead, a Frenchwoman, and 23 injured (17 French, 1 German, 3 Saudis,  2 Egyptians). Three suspects have been arrested.

Only one bomb exploded. A second bomb was located and detonated in a controlled explosion by police.

7:25 p.m.: An Egyptian official has told CNN that two of the four dead are French and one is Egyptian. The nationality of the fourth fatality is still unknown.

An unexploded bomb was also found near the Al Hussain mosque.

7 p.m. GMT (9 p.m. Cairo): Two bombs have exploded near the Al Hussain mosque in the Khan al-Khalili district of Cairo, killing four and wounded at least 18.  One of the dead and most of the injured are European tourists. The Egyptian Interior Ministry says it has updated two suspects.