DUBAI, United Arab Emirates (AP) — Separatists in southern Yemen accused Saudi Arabia on Friday of targeting their forces with airstrikes, something not immediately acknowledged by the kingdom after it warned the forces to withdraw from governorates they recently took over.

The Southern Transitional Council, backed by the United Arab Emirates, said the strikes happened in Yemen’s Hadramout governorate. It wasn’t immediately clear if there were any injuries from the strikes, but it further raises tensions in the war-torn nation and puts at risk a fragile Saudi-led coalition that has been battling the Iran-backed Houthi rebels in the country’s north for a decade.

Amr Al Bidh, a foreign affairs special representative for the Council, said in a statement to The Associated Press that its fighters had been operating in eastern Hadramout after facing “multiple ambushes” from gunmen. Those attacks killed two fighters with the Council and wounded 12 others, Al Bidh said.

The Saudi airstrikes happened after that, he added.

The Council’s satellite channel AIC aired what appeared to be mobile phone footage it described as showing the strikes. In one video, a man speaking could be heard blaming the strike on Saudi aircraft.

Officials in Saudi Arabia did not immediately respond to a request for comment from the AP. On Thursday, the kingdom called on Emirati-backed separatists in southern Yemen to withdraw from the two new governorates they now control.

The Council moved earlier this month into Yemen’s governorates of Hadramout and Mahra.

Those aligned with the Council have increasingly flown the flag of the flag of South Yemen, which was a separate country from 1967-1990. Demonstrators rallied on Thursday in the southern port city of Aden to support political forces calling for South Yemen to again secede from Yemen.

Following the capture of Yemen’s capital, Sanaa, and much of the country’s north by the Houthis in 2014, Aden has been the seat of power for the internationally recognized government and forces aligned against the Houthi rebels.

The actions by the separatists have put pressure on the relationship between Saudi Arabia and the UAE, which maintain close relations and are members of the OPEC oil cartel, but also have competed for influence and international business in recent years.

There has also been an escalation of violence in Sudan, another nation on the Red Sea where the kingdom and the Emirates support opposing forces in that country's ongoing war.