The Kingdom of Saudi Arabia sent a written warning about accused Boston Marathon bomber Tamerlan Tsarnaev to the U.S. Department of Homeland Security in 2012, long before pressure-cooker blasts killed three and injured hundreds, according to a senior Saudi government official with direct knowledge of the document.
The Saudi warning, the official told MailOnline, was separate from the multiple red flags raised by Russian intelligence in 2011, and was based on human intelligence developed independently in Yemen.
Citing security concerns, the Saudi government also denied an entry visa to the elder Tsarnaev brother in December 2011, when he hoped to make a pilgrimage to Mecca, the source said. Tsarnaev's plans to visit Saudi Arabia have not been previously disclosed.
The Saudis' warning to the U.S. government was also shared with the British government. 'It was very specific’ and warned that 'something was going to happen in a major U.S. city,' the Saudi official said during an extensive interview.
It 'did name Tamerlan specifically,' he added. The 'government-to-government' letter, which he said was sent to the Department of Homeland Security at the highest level, did not name Boston or suggest a date for his planned attack.
A Homeland Security official confirmed Tuesday evening on the condition of anonymity that the 2012 letter exists, saying he had heard of the Saudi communication before MailOnline inquired about it.
The high-ranking Saudi official whom MailOnlne interviewed at length provided a wealth of detail about the warning he says his government sent to the United States. He spoke on condition of anonymity because he is not authorized to talk publicly about foreign intelligence, or about Saudi Arabia’s diplomatic relationship with the United States.
He suggested that the Saudi Ministry of Interior sent the letter out of an abundance of caution in order to be helpful to the United States, even though its intelligence on Tsarnaev wasn't yet fully developed.
'With Saudi Arabia it's always code red,' he said. 'There's no code orange, or code yellow. Always red.'
The Saudi government, he added, alerted the U.S. in part because it believed American authorities should be inspecting packages that came to Tsarnaev in the mail in order to search for bomb-making components.