(CBS) -- Police are investigating home invasions at two addresses just a few miles apart in the south suburbs over the weekend.

The more recent: Sunday morning in Orland Park.

Police say an armed man wearing a ski mask got into a home through an open garage door and used pepper spray on the 68-year-old man inside the home before fleeing with jewelry.

About 10 hours earlier and four miles away in Tinley Park, police there say three men with guns got into a home - also through an open garage door - and demanded cell phones and money from the people inside.

Three people in that home suffered minor injuries in the home invasion.

Orland Park Police - the scene of the more recent attack - say there's no evidence at this point to suggest the two home invasions are related.