Israeli warplanes on early Thursday carried out two successive airstrikes on targets belonging to the Islamic Hamas movement, which rules the Gaza Strip, witnesses and security sources said.

The Israeli warplanes struck a training camp belonging to al-Qassam Brigades, Hamas' armed wing, in the south of Zeitoon neighborhood in southern Gaza city.

Witnesses in the city said that F16 war jets and Apache fighting helicopters hovered over Gaza City, and two intensive explosions were heard. There was no reports of injury.

Meanwhile, Israeli F16 warplanes also attacked a training camp of the Hamas armed wing in the west of the southern Gaza Strip town of Khan Younis. No injuries were reported.

Earlier on Wednesday night, Israeli warplanes struck a group of militants in eastern Gaza City, injuring two, according to medical sources.

Also on Wednesday, an Israeli army spokesman told Israel Radio that militants from Gaza fired two Grad rockets at the southern Israeli city of Beer Sheba.

The spokesman said that the first rocket hit a house in the city, where severe damages were caused, and the second rocket hit an empty area. No injuries were reported in the attack.