A Grantham man has admitted petrol-bombing a council building, causing damage put at thousands of pounds.
Christopher Taylor, 33, of Stamford Street, pleaded guilty at Lincoln Crown Court on Friday to arson.
Damage estimated at £50,000 was caused after fire destroyed offices and at South Kesteven District Council on 11 May.
Recorder Howard Morrison QC adjourned sentence for eight weeks for a medical assessment of Taylor to take place.
He also placed Taylor under an interim hospital order.