Palestinian eyewitnesses in the Gaza Strip report that two gunmen were killed on Friday in an Israeli air strike on the Beit Hanun neighborhood.
The Israel Defense Forces said helicopter gunships fired missiles at two gunmen spotted collecting rocket launchers used to fire Qassams at Israel.
The army said an Israeli woman was injured by shrapnel from a rocket fired by the launchers early next week.
Palestinian sources denied that the missiles had targeted gunmen, saying two children were killed in the attack.
They said the two teenagers were riding their bikes in a field used by gunmen to launch rockets at Israel when the missiles struck.
Israeli troops have been operating in Gaza since late June to stem rocket attacks against its communities and to free Gilad Shalit, an IDF corporal kidnapped on June 25 in a cross border attack.
About 220 Palestinians were killed in the Gaza Strip since the IDF launched operations there. Israel says most of the victims were gunmen. The Palestinians dispute this, saying over half of those killed are innocent civilians.
Hanan Greenberg contributed to this report