An Irishman working as a senior United Nations official in Gaza City has escaped an ambush on his convoy.
The armoured car carrying John Ging was attacked by masked Palestinian gunmen as it was travelling from the Erez border crossing.
No one was injured in the attack.
Mr Ging, who is the director of the UN Relief and Works Agency in Gaza, said the attack was unprecedented and security arrangements are now being reviewed.
He also said he hopes his attackers are caught.
Reports say gunmen got out of their car and started shooting at Mr Ging's armoured vehicle, striking it at least 11 times. No one was injured and he was finally able to drive away.
Violence has escalated in the Gaza Strip since Hamas came to power a year ago, with a power struggle pitting the Fatah-dominated security services against Hamas militants.
Although around 20 foreign journalists and aid workers have been kidnapped and released unharmed in the past year, such a direct and bold attack against foreigners in the Gaza Strip is unusual.
The latest victim, BBC reporter Alan Johnston, has not been seen since he left the BBC bureau in Gaza City on Monday afternoon. Palestinian security sources said he was kidnapped.
UNRWA, the largest UN agency with more than 25,000 employees, was established in the aftermath of the 1948 Arab-Israeli war to provide relief for upwards of 700,000 Palestinian refugees uprooted by the war.
In the Gaza Strip alone, UNRWA cares for nearly one million refugees.
