Hamas arrests Fatah rivals after Gaza blasts

GAZA CITY (CNN) -- Hamas security forces arrested more than 100 rival Fatah members in Gaza Friday night and Saturday while searching for suspects in bombings that killed five Hamas militants and a child, a security source said.

Police set up checkpoints across Gaza City, while other security forces targeted the headquarters of the rival Fatah movement and the homes of its members, arresting "tens" of them, a security source said.

The Islamist group Hamas blamed the Friday attacks on members of Palestinian Authority President Mahmoud Abbas' Fatah party.

Fatah has denied the charges.

The two factions have been bitterly divided since Hamas drove Abbas' security forces from Gaza last year.

Five of the deaths resulted from an explosion Friday night behind a tent on the beach, a hospital spokesman said. He said 20 people were wounded in that blast, which occurred about 9:30 p.m. (2:30 p.m. ET).

Among the dead was Amar Musubah, a Hamas military commander, who has been the target of numerous assassination attempts by the Israeli military. Watch a senior Hamas official react to the deaths »

Earlier in the day, a man died and two people were wounded when a bomb exploded at a coffee shop.

A Hamas politician escaped injury from a separate explosion Friday morning outside his home.

Journalist Talal Abu-Rahmi contributed to this report.

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