( CNN) The US military accused Russia on Thursday of blocking the delivery of critical aid to the Rukban refugee camp in Syria, a desert camp that the United Nation has described for months as in a “desperate” situation.

“Counter to the false claims made to the United Nation by Russia, conditions are ripe for this critical aid to be delivered to the people of Rukban, where conditions remain dire, ” he added.

The camp sits within the 20 -square-mile de-confliction zone that surrounds the US base in Al Tanf, Syria, which was established by the Russians and the US-led coalition to prevent the two sides from coming into accidental contact.