From the White House pool report:
One of the presidential limousines had mechanical trouble and had to be replaced before President Obama's arrival in Tel Aviv, according to the Secret Service.
"We experienced mechanical trouble with one of the cars," said Edwin Donovan, a spokesman for the Secret Service. "We don't know the cause."
There have been media reports that the vehicle had been filled with diesel fuel rather than gasoline.
Donovan said the Secret Service "did not have a read on what the specific issue is at this point."
POTUS was driven in a different vehicle, he said. "That's why we bring different multiple vehicles," Mr. Donovan said.
Statement from the White House will follow.
UPDATE: The Secret Service takes the blame:
Here is a statement from Edwin Donovan, spokesman for the USSS, on the vehicle incident.
Clarification from Pool Report #7: The statement is from the USSS, not the White House:
"One of our protective vehicles experienced mechanical problems in Israel earlier today. This is why we bring multiple vehicles and a mechanic on all trips. Situations like this are planned for extensively by our advance teams so that the President's itinerary is unaffected by these types of issues."