Union alarm as mining giant mulls sick leave overhaul

Rio Tinto workers say they have not been given enough details about proposed changes to sick leave. (David Mariuz/AAP PHOTOS)

Thousands of iron ore workers could have their sick leave entitlements slashed, a union claims.

Rio Tinto has proposed a slew of changes to its sick leave policy, including reducing workers' entitlement of 90 days per year to 12 days, the Australian Manufacturing Workers' Union said.