Three of the four sisters involved in a fire and knife incident on Sunday are said to be in critical condition.

They include the eldest sister, 58, who's arrested on suspicion of wounding, as well as the two younger sisters, 51 and 46.

The fourth woman, 53, is also said to be seriously hurt.

All of them suffered burns after a fire broke out at a flat in Tsz Lok Estate in Tsz Wan Shan. The 51-year-old also had a knife wound in her abdomen.

Police said the women got into a quarrel over a property transaction issue, and there was no evidence to suggest that others were involved in the matter.

Officers are continuing their probe into the case.