Military aircraft fired missiles at more Hamas targets on Saturday, killing five people in Israel's continuing offensive aimed at halting rocket attacks from Gaza.
The dead were reported to be members of the paramilitary Executive Force, a parallel police force dominated by Hamas.
They were in a compound near the home of Palestinian Prime Minister Ismail Haniyeh. He was not hurt, but doctors at Gaza's Al Shifa Hospital said six other people were wounded.
In all, Israeli aircraft launched 11 missile strikes on Saturday, while one of six rockets launched from Gaza landed in Israel.
Israeli troops also arrested a Palestinian cabinet minister, Wasfi Kabha, a member of Hamas, at his home in the West Bank. The action came two days after a sweep in which more than 30 Hamas politicians were arrested, including the education minister.
More than 220 Kassam rockets have been fired into southern Israel from Gaza over the past 10 days, causing widespread property damage and killing one woman.