Palestinian security said 11 missiles hit two boats, an office, a car and a cabin owned by Abbas Beker next to the Gaza fishing dock. No one was hurt.
The Israeli military said the targets were facilities used by Palestinians to smuggle arms into Gaza.
Also early today, an Israeli aircraft fired a missile at a house in the Bureij refugee camp in central Gaza, destroying the two-story building.
Residents said it belonged to a Hamas activist, and the Israeli military gave 20 minutes warning to residents to clear the area. Three people were slightly wounded.
The military said it targeted a Hamas weapons store.
Reuters reports the Israeli army has killed 154 Palestinians, more than half of them civilians, in Gaza since it began its offensive there.
Minister released
Yesterday, Israel released one of the eight Palestinian Cabinet ministers that it seized in a June crackdown on the radical Hamas group, which controls the Palestinian government.
Palestinian Prisoners' Affairs Minister Wasfi Kibha was set free by an Israeli military court judge after a military prosecutor failed to produce charges against him, his lawyer Mustafa Azmouti told The Associated Press.
He was the third member of the Hamas government to be released since the West Bank roundup on June 29, four days after the cross-border attack from Gaza.
Israel still holds five Hamas ministers and dozens of Hamas MPs.