Two men died in a two-vehicle crash in Co Donegal on Saturday afternoon.Four other people were injured in the incident that occurred on the N15 in Birchhill, Co Donegal, shortly after 2pm.A man in his 20s and a man in his 30s, who were travelling in one of the vehicles, were pronounced dead at the scene, gardaí said in a statement.Two other occupants of the same vehicle, a woman in her 20s and a man in his 20s, were taken to Letterkenny University Hospital. Their injuries are believed to be non life-threatening.A man and woman in their 40s who were in the other vehicle are also being treated for non life-threatening injuries at the hospital.The remains of the men who died were taken to Letterkenny Univerity Hospital where postmortems will take place.Garda technical staff will examine the scene of the crash and the road has been closed.Gardaí are appealing for witnesses of the incident to come forward and asked road users who may have camera footage (including dashcam) and were travelling in the area between 1.30pm and 2.30pm to make this footage available to them.Anyone with information is asked to contact Donegal Town Garda station on (074) 912 5888, the Garda Confidential Line on 1800 666 111, or any Garda station.