GAZA (Reuters) - The Palestinian Authority has arrested three leaders of the militant Islamic movement Hamas in the Gaza Strip, Palestinian police chief Ghazi Jabali said on Sunday. Israel has pressed the Palestinian Authority to crack down on Hamas, which opposes peace deals and has killed scores of Israelis in suicide attacks. „They were arrested for security reasons,“ Jabali told Reuters. Witnesses said Abdel-Aziz al-Rantissi and Ahmed Nimir were arrested on Saturday and Ismail Abu Shanab was taken into custody on Friday. Rantissi, jailed since April 1998 following the killing of the movement‘s chief bomb-maker Muhyideen al-Sharif, was freed last month to attend his mother‘s funeral. Hamas claimed responsibility on Saturday for a shooting that wounded two Jewish settlers in the West Bank town of Hebron last week.