Early Monday morning, gunmen of the Donetsk Peoples Republic arrived at the airport and took over the terminal building, prompting the Ukrainian military based there to issue an ultimatum to the rebels to lay down their weapons and leave. A massive firefight broke out which both fighter jets and attack helicopters were used by the Ukrainian military. The sound of gunfire and explosions filled the air as rebels and journalists ducked for cover along the access road to the airport terminal. VICE News found a small unit of DPR gunmen among the trees along the access road who had pulled back from their earlier positions closer to the airport. Gunfire seemed to follow them as shots hit the wall on the other side of the road and one of their wounded fighters, who had been shot in the upper thigh was evacuated in a civilian car. The gunfire intensified and the unit was forced to withdraw.