JERUSALEM (Reuters) - A relative of a Palestinian man shot dead after a late night car chase near Jerusalem accused Israeli police on Tuesday of killing the man even though he had stopped his vehicle. "They caught up with him and shot him. They shot him although he had stopped, not while the car was moving," said Nadir al--Salaymeh, the brother of the victim, Bilal al-Salaymeh. Israel's Jerusalem district police chief Yair Yitzhaki said officers were justified in opening fire on the car after pursuing it through two roadblocks in the chase from East Jerusalem towards the Palestinian-ruled town of Ramallah. Police said a second man had fled the vehicle after the shooting near Kalandia refugee camp north of Jerusalem on Monday night. "I can't find any explanation for such a ride at such an hour and under these circumstances," Yitzhaki said. Israeli security forces have been on heightened alert for possible Palestinian militant bombings following the death last week in Ramallah of Muhyideen al-Sharif, a master bombmaker of the Islamic Resistance Movement Hamas. A Palestinian inquiry on Monday determined that Sharif was killed in a power struggle within the militant Moslem group. One Palestinian witness told reporters at the scene of Salaymeh's death late on Monday that the shooting was a "clear assassination". "When the man stopped, the soldier came round and pointed his M-16 at him. It was a clear assassination. The man had his hand raised and they shot him," the witness, who did not give his name, told Abu Dhabi Television. An Israeli Justice Ministry unit which serves as a police watch -dog said an initial probe showed Salaymeh had no driver's licence and was driving an roadworthy vehicle. Police, fearing possible Palestinian violence after the killing, beefed up forces in Jerusalem at the start of the Moslem Eid al-Adha holiday.