TEHRAN, Young Journalists Club (YJC) - The device was one of two found inside a bag on a nearby rooftop, three security sources and state media reported.
Two policemen and an onlooker were also injured when the device exploded, the security sources said.
There was no immediate claim of responsibility. Egyptian security forces have for years battled terrorist groups who have attacked Coptic Christians, tourists and security personnel.
Security forces have stepped up their presence outside churches and other places of worship ahead of New Year’s Eve and Coptic Christmas, which is celebrated on Jan. 7.
Source: Reuters