Niagara Regional Police are seeking arrest warrants for two people they believe stole a vehicle and more than $500,000 worth of valuables from a couple they were house-sitting for.

The pair made off with the homeowners' retirement savings, police said in a release Tuesday afternoon. Police did not specify what the valuables were, or why they were left in the home.

Investigators were able to recover the stolen vehicle and about $4,800 worth of goods which were pawned at two St. Catharines pawn shops.

Police say the thieves - whose whereabouts are unknown - are wanted on a total of 38 charges including theft over $5,000, theft of a motor vehicle and breach of probation.