From Al Jazaeera:

An airstrike by the Saudi-led coalition Tuesday in the Mawza district of Taiz struck three displaced families living in a straw house. No military targets were nearby. At least 20 people were killed, including 4 children. The United Nations is blaming the Saudi-led coalition for the attack.

From the UN News Centre:

According to Mr. Colville, the families had been recorded by OHCHR as displaced, along with three others, from their homes in a different village nearby three months ago as a result of other airstrikes, and had set up four rough shelters in an open area in Al Asheerah.

The village is located about eight kilometres from the Khalid Bin Al Walid Military Camp, where clashes between pro-Hadi forces, backed by the Coalition Forces, and the Houthis are taking place.

Noting that according to available information, there did not appear to have been “any military objectives anywhere” in the immediate vicinity of the destroyed house, the OHCHR spokesperson underscored that attacks targeting civilians or civilian objects or indiscriminate or disproportionate attacks are prohibited under international humanitarian law.