Man's death at WA mine site 'suspicious'

The death of a man aged in his 40s at a mine site in Western Australia's north is being treated as suspicious.

Police were called to the site, 130km from Port Hedland, about 6.30am on Monday and a man in his 30s is being questioned.

Homicide Squad detectives from Perth are also travelling to the site.

Acting Assistant Commissioner Greg Knott told reporters he understood the death had affected mine operations.