Just before 6 o clock yesterday evening, four masked men forced a man his 70s to the ground in the farmyard on Tullymoan Road. The victim suffered a minor injury.
They then entered the farm armed with a grape hoe they had picked up.
They threatened three other elderly residents and ransacked the property before taking a small amount of cash.
They escaped in a black car in the direction of Clady.
The four elderly victims were left badly shaken by the ordeal.
The robbers were all dressed in black and wore balaclavas.