North Wales Fire and Rescue say a body was found at a terraced house in Ffordd Llanllyfni, Penygroes, when they arrived to tackle a blaze on Tuesday afternoon.
The body was discovered in the kitchen at around 3pm by fire crews from Caernarfon. More details are expected later.
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There are calls for dog owners to do more to control their animals after a spate of attacks on dogs in Port Talbot.
Cloudy with rain continuing, mainly affecting western-facing hills.
The last surviving members of the north Wales branch of the Normany Veterans Association held their last formal meeting today.