VIENNA, Austria (AP) _ A Jordanian airliner was diverted to Vienna today after an anonymous caller claimed there was a bomb aboard. Passengers and crew were safely evacuated and no bomb was found inside the plane, officials said.

The Royal Jordanian jetliner had been headed from Chicago to Amman, Jordan, with 233 passengers and a crew of 15, said Vienna airport spokeswoman Sabina Kropej.

She said the bomb threat was made shortly after the plane took off after a refueling stop in Amsterdam.

Police searching the Lockheed L-1011 TriStar, parked on the tarmac in the Austria capital, discovered no bomb inside.

``We found nothing,'' said Capt. Peter Bencza of airport police. But he said police still were going through passengers' luggage.

The passengers were being questioned by police, said airport spokeswoman Hildegard Frank. Passengers included American, Dutch and Jordanian citizens.

Bencza said police were taking special care because of the tension in the Middle East following the assassination Saturday of Prime Minister Yitzhak Rabin of Israel.

There was conflicting information about where the bomb threat was received. Bencza said it was received in Amsterdam, but a Royal Jordanian sales manager in Amsterdam, Robert Ballierux, said the call was made to the company's head office in Amman.

An airport official in Amman, who spoke on condition of anonymity, said the caller spoke broken Arabic.

Israel radio initially reported that a Jordanian plane was hijacked. But an Israeli radio monitor later said a bomb threat was received by a Royal Jordanian flight.