Five Yemeni children were killed in an attack on their home in flashpoint Hodeida province, the UN and medics said, months into a ceasefire agreed by the government and rebels.

The UN children's agency (UNICEF) said that the five children were "playing at home" when they were killed on Thursday.

It did not give details on the nature of the attack or the perpetrators.

"Each day, eight children are killed or injured across 31 active conflict zones in the country," UNICEF executive director Henrietta Fore said in a statement Saturday.