A man working away from his van returned to the vehicle to find that a Stihl saw had been stolen from it while it was parked on a Sheffield street.
The thief responsible struck in Eckington Road, Beighton.
Police officers in Sheffield are also investigating thefts from vehicles parked in Lowedges Place, Lowedges; Kenwood Road, Nether Edge; Meadowhead in Meadowhead; Bramall Lane; Highfield and Bagshot Street, Sharrow.
Other cars have been broken into in Bannerdale Road, Carterknowle; Napier Street, Sharrow and Shoreham Street, Highfield.
Anyone with information should call South Yorkshire Police on 101.