Police hope CCTV images of a group of boys on a Kawakawa street will lead them to the youths who bashed a long-serving vintage railway volunteer.
Mike Bradshaw, 78, known locally as "the train man", was attacked after he disturbed a group of youths ransacking cupboards in the Bay of Islands Vintage Railway Trust engineering shed in Kawakawa on the morning of April 29.
He was punched and kicked to the ground, suffering bruised ribs, a black eye and a laceration to the head.
Bradshaw said he didn't recognise the seven youths, aged in their mid- to late teens, which made him think they weren't from Kawakawa.
Now police have released CCTV images in the hope that someone will know who they are.