The thefts happened in a housing estate in Roscommon town during the early hours of yesterday morning

Anyone with any information is asked to contact local Gardai.

A VW van was taken in one incident from outside a house.

Gardaí give a number of ways to avoid the theft of catalytic converters.

Several homes were targetted by thieves last week in different locations in the county.

Gardai believe the incidents may be linked.