Not for the first time, a member of the Rothschild family has been implicated in a conspiracy theory that was this week being peddled by international business media outlets and denounced by Jewish groups.

Reports printed in the International Business Times notes that four members of a patent semiconductor were in the missing Malaysian jet, leaving Jacob Rothschild the fifth co-owner of the patent the sole owner now.

In its regular blog, CST’s director Mark Gardner wrote: “It may be April Fools day and these people may be fools, but none of this is particularly amusing.”