In what was tagged response to Palestinian fire balloon attacks across the border, Israeli warplanes have on Tuesday bombed Hamas-ruled Gaza.
An Israeli military statement said fighter jets and other aircraft struck underground infrastructures belonging to the Hamas terror organisation in the Gaza Strip.
According to a Hamas source, the strikes came as visiting Egyptian security officials strove to defuse the latest uptick in violence.
The source told AFP that the Islamists had held talks with the Egyptian delegation in Gaza before it left the territory for meetings with the Israelis and the West Bank-based Palestinian Authority.
Hamas and Israel clash sporadically with Palestinian despite the truce backed by Egypt, the UN and Qatar last year.
Gaza security sources revealed that the strikes hit Hamas lookout posts at Rafah in the south of the territory and Beit Lahia in the north.
Meanwhile, tensions have been rising for more than a week, with Hamas firing rockets and launching bundles of balloons across the border.
In response, Israel has closed its Kerem Shalom goods crossing with the Gaza Strip and imposed a ban on fishing off the Gaza coast.