That’s what one unnamed Saudi official has told Britain’s Daily Mail. That does change the equation in terms of “stove-piping” since 9/11. But I would just note that this is in the Mail – not exactly a barometer of reliability – and that the piece contains its own caveat:

If true, the account will produce added pressure on the Homeland Security department and the White House to explain their collective inaction after similar warnings were offered about Tsarnaev by the Russian government. A DHS official denied, however, that the agency received any such warning from Saudi intelligence about Tamerlan Tsarnaev.

My italics. For more context on the Mail, see this hilarious video. Meantime, we’ll wait for confirmation.