Security sources said the attacker fled the scene. There was no word on his motive.
The attack on the station in north Cairo came less than a week after a bomb exploded in a popular tourist area of Egypt's capital, killing a French teenager. That bombing was the first deadly attack on tourists in Egypt since 2006.
On Friday, an Egyptian man stabbed an American teacher in a Cairo tourist area, wounding him in the face. Egyptian state media said the attacker told police he hated foreigners and was angry over the recent Israeli offensive in the Gaza Strip. The Egyptian government, an ally of Washington, has faced heightened domestic discontent in recent months over its enforcement of an Israeli blockade on Hamas-run Gaza, especially during the Israeli offensive that ended on Jan. 18.
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