Gun laws are back in the spotlight in the US, following the latest school shooting.

Audrey Hale killed six people at her former Christian elementary school in Nashville.

US correspondent Katherine Firkin told Kate Hawkesby the incident has sparked debate on Tennessee's approach to firearms, one of the most relaxed in the country.

She says requirements for background checks have been totally removed and there are no laws allowing weapon seizures from violent suspects.

Firkin says the shooter legally purchased seven different guns from five different stores over the last few years.

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