JERUSALEM - An aide to Israeli Prime Minister Benjamin Netanyahu says the two-state solution to the Israel-Palestinian conflict favoured by U.S. President Barack Obama is "childish and stupid."

The aide spoke to reporters on the plane carrying Netanyahu home from talks in Washington. He spoke on condition of anonymity because he was not authorized to speak to reporters on the record.

His views were assumed to reflect Netanyahu's thinking.

Obama made it clear that the U.S. backs the creation of a Palestinian state, but Netanyahu has not endorsed the concept.

The aide said the two-states for two peoples idea is "childish and stupid, because the problem is more complex than that."