Hamas leader Yahya Sinwar threatened Friday that the next Palestinian rocket barrage from the Gaza Strip will surprise Tel Aviv. He brandished a sidearm captured from the Israeli covert unit which operated in Gaza a week ago. Did the Israeli enemy think our blood can be bought with Qatari dollars and fuel? He asked. Sinwar spoke in Khan Younes at a memorial meeting for the seven Hamas officers killed in the Israeli raid. It was also attended by Gen. Ahmed Abd El-Halq, head of the Palestinian desk in Egyptian intelligence, on whom the Israel government relied for mediating the Gaza ceasefire last week.