The clash began when the local police investigated a report of militants in an area south of Sangin , in Helmand Province , a big poppy-growing area where antigovernment militants have allied themselves with drug traffickers .
Helmand Province /location/location/contains Sangin
DT NN VBD WRB DT JJ NN VBD DT NN IN NNS IN DT NN NN IN NNP , IN NNP NNP , DT JJ JJ NN WRB JJ NNS VBP VBN PRP IN NN NNS .