A three-member gang robbed workers of a dairy farm after Thursday midnight on the outskirts of Kistapur village in Medchal, 40 km from here, after attacking them with sticks.
As the two dogs reared for security by the dairy farm owner started barking at midnight, a worker Raju stepped out of his single room quarter.
On seeing two robbers, he raised an alarm even as another offender joined the duo.
The gang overpowered Raju and tied him to a pole with ropes, Medchal Inspector A. Ram Reddy said.
They threatened to kill his wife and children and collected Rs. 2,500 from him and snatched his wife’s mangalasutra.
Later, the robbers woke up two other workers from Bihar living in adjacent rooms and beat up them with sticks. The scared workers ran away.
“The workers had tied the dogs to a pole fearing that they might attack newly born calves on the dairy premises. Had the dogs not been tied, the robbery would have been prevented,” the police said.