A spate of thefts from parked vehicles hit Market Deeping earlier this week.
At least four vehicles parked in Dovecote Road and Chestnut Way were targeted overnight between Tuesday and Wednesday.
Meanwhile in Bourne, intruders burgled a house after getting inside through a downstairs toilet window, police have confirmed.
The burglary happened in Bedehouse Bank, off Eastgate, between 9am and 11.15am on Tuesday.
Anyone with information should call 101, quoting (Market Deeping) incidents 63/99 of June 24 and/or 139 of June 23 (Bourne).