Palestinian sources say an Israeli aircraft has attacked a house belonging to a Palestinian militant in the Gaza Strip.
Residents say an occupant of the home belongs to the Popular Resistance Committees, a coalition of Palestinian militant groups.
At least one person was wounded.
The Israeli military says the airstrike targeted a military arms cache.
The incident came hours after Palestinian militants fired a series of rockets from Gaza that landed in and around the southern town of Sderot, killing an Israeli woman.
Israeli Defense Minister Amir Peretz says those responsible for the continuing rocket attacks against Israel will pay a heavy price. Peretz lives in Sderot, and one of his bodyguards was wounded in Wednesday's attack.
Several Palestinian groups, including the armed wing of Hamas, have claimed responsibility.
In other news, European Union lawmakers criticized Israel for an incident last week in the Gaza Strip. Nineteen civilians died when Israeli forces mistakenly shelled an apartment compound in the town of Beit Hanoun.
Many Palestinian rockets are fired from Beit Hanoun.
Separately, representatives of the international Middle East quartet -- the United States, Russia, the European Union and the United Nations -- met Wednesday in Cairo.
The quartet's talks focused on reviving the Israeli-Palestinian peace process, and on Palestinian efforts to form a unity government that would lessen the role of the ruling Palestinian militant group Hamas. The quartet demands that a new Palestinian government recognize Israel and abide by interim Israeli-Palestinian accords.
Some information for this report provided by Reuters and AP.