Actors Liv Ullmann and Michael York vowed to continue filming in Israel even if war breaks out, but they have left because their insurance company threatened to cancel their coverage, a publicist said Monday.

They flew to London on Sunday with their American director, Zigmond Vilmos, said the film's Israeli publicist, Miri Ben-Josef.Ullmann, 52, and York, 48, came last week to shoot "The Prodigal Father," about a Hungarian who travels to Jerusalem to unravel the mystery of his father's life.

"Their insurance company told them that if they don't leave, there will be no insurance," Ben-Josef said. She declined to name the company.

Producer Paul Solomon told the daily Yedioth Ahronoth that the Norwegian-born Ullmann and York, who is British, "were very sad when they left, and promised to return once things have calmed down."