Hamas authorities in Gaza have arrested two hardline Islamists in connection with rocket attacks on Israel, according to sources close to a Salafist group, cited Thursday by Agence France Presse. Speaking on condition of anonymity, the source said the Hamas "internal security apparatus in the last two days arrested two mujahedeen. One was released after several hours. The other is still detained." The source also said the move was part of a "campaign to pursue Salafists after the targeting of Israel with rockets." A Gaza-based Salafist group claimed firing rockets at Israel on Tuesday and Wednesday.