One of four sisters involved in a fire and knife incident in Tsz Wan Shan on Sunday has died.

The woman, 58, was the eldest of the four women who all suffered burns in a fire at a flat in Tsz Lok Estate.

She had been arrested on suspicion of wounding.

Two of the woman's sisters, 51 and 46, are said to be in a critical condition in hospital while the third, 53, is seriously ill.

The 51-year-old also suffered a knife wound to her abdomen.

Police said earlier that they believe the sisters were in a dispute over a property deal.