Israel is keeping up its offensive on Palestinian targets in the Gaza Strip, with air strikes on a suspected arms factory on Saturday.
The Palestinian leader and Egyptian president discussed Gaza
A tunnel used by Palestinian militants was also bombed, the Israeli army said.
On Friday, the Israeli army withdrew from the area, following a two-day offensive which killed 29 Palestinians.
The renewed attacks come as Palestinian leader Mahmoud Abbas held brief talks with President Mubarak of Egypt to discuss proposal to end the violence.
There were no reports of casualties from the latest air raids.
Israeli ground forces were also reported to have launched a new incursion into northern Gaza, near the Erez crossing point.
In its earlier two-day operation, the Israeli army destroyed several buildings across the territory, killing two Palestinians, one a teenage boy.
The Israeli army says it attacked weapons facilities in four areas in a continuing campaign to weaken militant groups in Gaza.
It claimed to have killed 25 Palestinian militants.
More than 100 Palestinians have been killed, many of them civilians, in Israeli air strikes and incursions since Palestinian militants kidnapped a young Israeli soldier more than a month ago.
The intense attacks on Lebanon have overshadowed the continuing violence in the Gaza Strip, the BBC's Arab affairs analyst Magdi Abdelhadi reports.
Mr Abbas and President Mubarak were due to look at ways to end the fighting.
Reports say that Mr Abbas is now working to revive an Egyptian proposal to secure the release of the captive Israeli soldier in return for Israel freeing Palestinian prisoners at a later stage.
Our correspondent says the Palestinian leader will have sought to refocus attention on the plight of his people at a time when the US Secretary of State Condoleezza Rice is also set to begin another visit the region again to discuss ways to end the fighting in Lebanon.
Mr Abbas met Dr Rice when she visited the West Bank earlier this week.
Mr Abbas's visit to Egypt is the start of a regional tour that will take him to Saudi Arabia and other Gulf states.