A Molotov cocktail was used to set fire to a Mukilteo church last month.

Remains of the device have been recovered and are currently being analyzed for fingerprint and DNA evidence by the State Patrol Crime Lab, according to the Mukilteo Police Department.

The Church of Jesus Christ of Latter-day Saints building at 11001 Harbour Pointe Boulevard already was filled with fire and smoke when firefighters arrived at about 3 a.m. Oct. 16. Within five minutes of their arrival, flames were shooting through the tile roof, and firefighters were restricted to battling the blaze from outside and through the windows of the brick building.

Fire investigators determined the fire was deliberately set.

About 800 congregants from two church wards worshipped at the building, at the intersection of Harbour Pointe Boulevard and Chenault Beach Drive.

A $10,000 reward for information leading to the arrest and conviction of the person or people responsible for the fire is being offered by the Arson Alarm Foundation and the Washington Insurance Council.

Anyone with information about the fire is asked to call Crime Stoppers at 1-800-222-TIPS (8477) or the Arson Hotline at 1-800-55-ARSON (2-7766).