WILMINGTON, DEL. (CBS) — Three firefighters who were killed in the line of duty were remembered Monday during a ceremony in Wilmington, Delaware.

The ceremony took place at Wilmington Fire Station #4. It marked one year since the blaze that claimed the lives of Captain Christopher Leach, Lieutenant Jerry Fickes, Jr. and Lieutenant Ardythe Hope.

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Leach and Fickes were killed while battling the fire. Hope was injured and died several months later as a result.

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Beatriz Fana-Ruiz was charged with murder and arson after authorities determined she had intentionally set the fire at the home where she lived in the 1900 block of Lakeview Road.

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The ceremony included the presentation of three bronze plaques honoring the late firefighters, which will be permanently installed at the fire stations where each firefighter was assigned.