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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An investigation found patients were sworn at by staff, left in soiled beds and restrained with furniture.
A cool and breezy afternoon with a risk of showers along the North Wales coast. Rain expected to reach northwestern parts this evening.
Here are some of the key recommendations from the report into the care of patients on the Ablett Unit at Glan Clwyd Hospital.