Israeli jets early Saturday bombed two training camps in the southern town of Khan Yunis and the Nuseirat refugee camp in central Gaza, AFP reported.
There are no immediate reports of casualties.
The Israeli military refused to comment on the move as Tel Aviv escalated its ground and air strikes on the besieged territory, killing civilians and destroying property.
On Thursday, an Israeli unmanned plane reportedly launched a missile attack on the southern Gaza Strip, inflicting injuries on six Palestinians.
The drone strike hit a vehicle that was travelling in the southern city of Rafah along the coastal sliver's border with Egypt.
It followed several aerial assaults across the besieged enclave, which was reported to have caused no casualties.
Earlier on Wednesday, Israel's F-16 warplanes and Apache helicopters carried out multiple airstrikes across the Gaza Strip.
In June 2007, Israel and Egypt placed the territory under siege and imposed an unprecedented blockade on nearly all movement and supplies in and out of the coastal strip.
Poverty, unemployment, lack of medicine and medical equipment are the main issues in the Gaza Strip, while most Palestinian children are physically stunted from malnutrition.
The United Nations has repeatedly warned of a humanitarian crisis for Gaza's 1.5 million residents.
Human rights groups have also criticized the international community for its silence on the siege on Gaza and the 22-day Israeli war in December 2008 that shattered the stagnant economy of the territory.
The offensives killed more than 1,400 Gazans and inflicted a damage of above $1.6 billion on the territory's economy.