FIRESTONE, Colo. (CBS4) – Tuesday marks a year since a home explosion in Firestone claimed the lives of two men.

(credit: CBS)

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Mark Martinez and his brother-in-law Joey Irwin were inside a house located in the Oak Meadows neighborhood and were working on the water heater when the explosion happened on April 17, 2017.

(credit: CBS)

Two others in the home were also injured, including Mark’s wife Erin.

Mark and Erin Martinez (credit: CBS)

Martinez was employed by the city. In a ceremony in Firestone Tuesday morning, Erin attended a ceremony that honored his life and Irwin’s life and also paid tribute to the work of city staff in the year since the tragedy.

(credit: CBS)

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“On April 17 of last year we lost two men we knew well. It was a huge loss, but in the face of that enormous loss we have seen what Firestone is and what it has always been — a community that comes together both in life’s celebrations and its challenges,” said Firestone Mayor Bobbi Sindelar.

Erin Martinez at Tuesday’s ceremony. (credit: CBS)

Sindelar said Martinez and Irwin were “community members that embodied the very best of who we are.”

(credit: CBS)

Investigators determined the cause of the explosion and fire was gas from an uncapped line from a nearby existing well.

Anadarko Petroleum Corporation is the owner of the well and says they will permanently remove three wells from the neighborhood. Those wells are no longer in operation.

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