Crimestoppers have said it would pay the reward for information leading to the arrest and conviction of those responsible.
This is an absolutely heartbreaking incident which has devastated and shocked the entire community.
It is impossible to imagine how Dr Shakoor, who survived the fire, is coping with the loss of his family.
Please come forward to the independent charity Crimestoppers so this truly awful crime can be solved.
Ann Scott added that people had "nothing to fear" by contacting Crimestoppers as all witnesses could remain anonymous.
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The retrospective is so in-demand the museum will open its doors all through the night for the first time since it opened in 1857.