Dec. 26 (UPI) -- Saudi Arabia has reportedly fired on the eastern Hadramout province in Yemen.

The Southern Transitional Council, a separatist group in Yemen, claims that the Saudis fired warning airstrikes at its forces.

The STC seized two oil-rich provinces in December. The group is backed by the United Arab Emirates. It released a video showing the airstrikes that it said were close to its positions in Wadi Nahab in the Hadramaut province.

The strikes haven't been independently verified.

Saudi Arabia on Thursday made a diplomatic appeal urging the STC to abandon Hadramaut and al-Mahra, which it recently captured . The strikes would be the first military action by Saudi Arabia since that plea.