NYTimes: The US, Saudi Arabia & Jordan supplying Croatia-sanctioned weapons to Syria's rebels

"... But one senior American official described the shipments as “a maturing of the opposition’s logistical pipeline.” The official noted that the opposition remains fragmented and operationally incoherent, and added that the recent Saudi purchase was “not in and of itself a tipping point.”“I remain convinced we are not near that tipping point,” the official said.
The official added that Iran, with its shipments to Syria’s government, still outstrips what Arab states have sent to the rebels...
Another American official said Iran has been making flights with weapons into Syria that are so routine that he referred to them as “a milk run.” Several of the flights were by an Iranian Air Force Boeing jet using the name Maharaj Airlines, he said.
While Persian Gulf Arab nations have been sending military equipment and other assistance to the rebels for more than a year, the difference in the recent shipments has been partly of scale. Officials said multiple planeloads of weapons have left Croatia since December, when many Yugoslav weapons, previously unseen in the Syrian civil war, began to appear in videos posted by rebels on YouTube....
Officials familiar with the transfers said the arms were part of an undeclared surplus in Croatia remaining from the 1990s Balkan wars. One Western official said the shipments included “thousands of rifles and hundreds of machine guns” and an unknown quantity of ammunition.
Croatia’s Foreign Ministry and arms-export agency denied that such shipments had occurred. Saudi officials have declined requests for interviews about the shipments for two weeks. Jordanian officials also declined to comment.
Danijela Barisic, a spokeswoman for Croatia’s Ministry of Foreign Affairs, said that since the Arab Spring began, Croatia had not sold any weapons to either Saudi Arabia or the Syrian rebels. “We did not supply arms,” she said by telephone.
Igor Tabak, a Croatian military analyst, said that after a period when many countries in the former Yugoslavia sold weapons from the Balkan wars on black markets, Croatia, poised this year to join the European Union, now strictly adheres to international rules on arms transfers.
“I can’t imagine bigger quantities of weapons being moved without state sanctioning,” he said. “It is not impossible, but it is just very improbable.” He added that it was possible that such weapons could be moved by the intelligence services, ... .An official in Washington said the possibility of the transfers from the Balkans was broached last summer, when a senior Croatian official visited Washington and suggested to American officials that Croatia had many weapons available should anyone be interested in moving them to Syria’s rebels.... One Western official familiar with the transfers said that participants are hesitant to discuss the transfers because Saudi Arabia, which the official said has financed the purchases, has insisted on secrecy.
Jutarnji list, a Croatian daily newspaper, reported Saturday that in recent months there had been an unusually high number of sightings of Jordanian cargo planes at Pleso Airport in Zagreb, Croatia’s capital.
The newspaper said the United States, Croatia’s main political and military ally, was possibly the intermediary, and mentioned four sightings at Pleso Airport of Ilyushin 76 aircraft owned by Jordan International Air Cargo. It said such aircraft had been seen on Dec. 14 and 23, Jan. 6 and Feb. 18. Ivica Nekic, director of the agency in charge of arms exports in Croatia, dismissed the Croatian report as speculation...."