Egyptian security officials say a gunman has killed two Coptic Christian brothers in an attack on a liquor store in Giza province, just days after nine people were killed in an attack on a church and store in Cairo.
The officials said Monday the attack took place on New Year's eve, a busy night for liquor stores.
They say it is unclear whether the attacker was an extremist.
The officials requested anonymity because they were not authorized to brief the media.