RAMALLAH, West Bank, March 19 : Palestinian President Mahmoud Abbas on Monday blamed the Islamist Hamas group for the March 13 bomb attack on the convoy of Prime Minister Rami Hamdallah in Gaza, saying it was a “despicable and sinful act.” Hamdallah and Palestinian security chief Majid Faraj were uninjured when a roadside bomb exploded as they entered the Gaza Strip on their way to a ceremony in the enclave that is dominated by the Hamas faction and is a rival of Abbas’s Fatah faction. “We give congratulate the two big brothers (Hamdallah and Faraj) that they are safe after the sinful and despicable attack that was carried out against them by the Hamas movement in the Gaza Strip,” Abbas said in a speech in Ramallah.