He also linked the attack to violent protests by Bedouin tribesmen in the southern town of Rahat and a recent string of attacks against Israelis in occupied East Jerusalem.
"Those behind the Tel Aviv attack stand behind the Rahat riots and Jerusalem attacks: Abu Mazen [PA President Mahmoud Abbas], [Hamas leader Ismail] Haniyeh, [leader of the Islamist movement in Israel] Raed Saleh, [and Israeli Arab lawmakers] Haneen Zoabi, Ahmed Tibi and their partners," he was quoted as saying by Israeli daily Haaretz.
"It's all part of the same process of undermining Israel's right to exist as a Jewish state," he added.
Earlier in the day, a 23-year-old Palestinian boarded a Tel Aviv bus and attacked passengers with a knife, leaving five with moderate to serious injuries while four others were lightly wounded, Israeli police said.
The suspected attacker, who hails from the West Bank city of Tulkarm, was shot in the leg near the scene of the attack and arrested, according to police.
No Palestinian group has claimed responsibility for the bus attack. Leading Hamas member Ezzat al-Rashq, however, described it as "heroic and daring."