Democrats on a key Senate panel are holding up bomb sales for the Saudi air campaign in Yemen amid growing concerns over the rising death toll, Al-Monitor has learned.

Congress was notified Aug. 19 of the Obama administration's intent to provide Riyadh with thousands of precision-guided munitions. The sale is linked to the administration's effort to placate Gulf countries' concerns about the Iranian nuclear deal, but it has hit a snag with Democrats on the Senate Foreign Relations Committee who want to see the Saudi-led campaign reeled in.

“What we are concerned about is that there is not a military solution in Yemen,” Sen. Ben Cardin, D-Md., the top Democrat on the panel, told Al-Monitor. “What we want to do is get the parties serious about implementing a political solution. We thought we had a clear track to that, and it's off track right now. So we want to get it back on track.”

Cardin described the delay as a fairly routine matter of lawmakers and staff pressing the administration for answers and reassurances. He and others made it clear, however, that senators on the panel, particularly Democrats, have a wide array of concerns they want to see addressed.