Israeli fighter jets attacked several targets in southern Gaza Strip late Tuesday hours after Palestinian militants fired a rocket into Israel, witnesses and security sources said.

The first strike targeted an abandoned building at what used to be Gaza's airport southeast of Rafah, the unnamed security sources said.

Minutes later, an F-16 plane dropped a bomb on a tunnel located on Gaza-Egypt borders.

There has been no reports on casualties in the two airstrikes.

Earlier Tuesday, an Israeli army spokesman announced that a missile has landed in an open space in southern Israel, fired from the Gaza Strip. No Palestinian group has claimed responsibility for the attack.

Israeli Prime Minster Benjamin Netanyahu has also threatened to respond to the floating of explosive-laden barrels towards Israel after three Palestinian groups said they were behind sending the bombs to attack Israeli marine targets.

The Islamic Hamas movement, which controls Gaza, maintains a shaky, undeclared ceasefire with Israel since the end of Gaza war in January 2009. Smaller militant groups fire rockets into Israeli lands near Gaza from time to time.

(Xinhua News Agency February 3, 2010)