A Kearney policeman received moderate injuries in an accident Tuesday afternoon in Clay County. According to the Highway Patrol, officer Barney Hatfield, 57, was responding to an accident at the I-35 northbound ramp to Highway 92 when he was struck in the rear by a northbound vehicle being driven by Sherrie Robb, 66, of Lathrop.  The impact caused Hatfield to travel off the road and overturned.  Robb also received moderate injuries and both were transported to Liberty Hospital.  Investigators said Hatfield had activated his emergency equipment prior to the collision.