Private guards at Palamu medical college in Daltonganj on Monday morning went on strike taking the college authorities by all surprise said sources.The guards went on strike for the payment of their wages lying due over the last two months.Principal of medical college JR Prasad said, “These guards are not ours. We have neither appointed them nor are we in any way responsible for their salary payment.” Prasad said these guards are of construction agency of this medical college, which has hired them from security set up. Principal said, “We have absolutely no role in their job or work here. It is the construction agency the hiring body that takes care of them and deploys them at strategic locations in the college.” He said, “We heard that this construction agency sat with them and the guards were back to duty in a few hours time.”