Vacated tenants that owe two months rent

[Kim Le]

Location: New Orleans, La... I have tenants that have not paid rent for two months. They decided not to continue their lease and that they have vacated the property. I emailed her for the keys to the property. I did not receive an email back so I went to check on the property and also change the locks. I found items that belongs to the tenants. I have not touch anything yet. I finally get an email from the tenants asking to retrieve items because I have change out the locks. Can I get some guide on how to approach this matter appropriately?