One of the limousines in Barack Obama's fleet has broken after reports that it was mistakenly filled with the wrong fuel at the start of the US president's visit to Israel.

Another limo is on its way from Jordan, according to Ma'an News agency, citing Israel's Channel 10, reportedly after a mixup over whether the vehicle ran on diesel or gasoline.

Ma'an reports:

Hebrew-language websites described the malfunctioning limo, brought from Washington specially for the visit, as the first unforseen incident during Obama's three-day visit to the region.

Obama is scheduled to leave the airport to Jerusalem in a helicopter. A parade of Black Hawk helicopters will follow the presidential helicopter carrying his delegation.

According to the Associated Press, the US secret service said the vehicle suffered mechanical problems before Obama arrived but would not say what the problem was.

The secret service said its advance teams plan ahead for these types of glitches. "This is why we bring multiple vehicles and a mechanic on all trips," said spokesman Brian Leary.

It was not the only unscripted moment of the visit so far: our Jerusalem correspondent, Harriet Sherwood, notes that Obama apologised to the Israeli prime minister about the size of the presidential entourage.

Obama to Bibi, as they walk away, on mic: 'it's embarassing, our entourage. My wife, Michelle, teases me mercilessly' #ObamainIsrael — Harriet Sherwood (@harrietsherwood) March 20, 2013

Follow continuing coverage of Obama's visit to Israel on our live blog.