Six children are killed or injured every day in Yemen , the United Nations Children's Fund, UNICEF said on Tuesday.

As the country risks becoming a failed state, children as young as 10 years old are being recruited to fight, the UN agency reported.

"A brutal conflict and a fast-deteriorating humanitarian situation are devastating the lives of millions of children in Yemen and have brought the country to the point of collapse," said a UNICEF report titled "Children on the Brink" stated on Tuesday.

Some 934 children were killed and 1,356 were injured last year in Yemen. More than 60 percent were killed and injured in airstrikes across the country, Julien Harneis, UNICEF's representative in Yemen told reporters in a teleconference on Tuesday.

"These numbers are almost seven times higher than the whole of 2014. With more than 50 verified attacks on schools, children were also killed while at school or on their way to or from school. These numbers represent the tip of the iceberg as they only indicate the cases that UNICEF was able to verify," the report said.

According to the report, the recruitment and use of children in fighting in Yemen continues to increase.

"We have seen a massive spike in the recruitment of children. UNICEF verified 848 cases of child recruitment [last year] by all parties mostly Houthis," said Harneis.

"UNICEF estimates that nearly 10,000 additional deaths may have occurred among children under five years old in the past year due to preventable diseases as a result of the decline in critical health services, including immunization and the treatment of diarrhea and pneumonia. This figure is in addition to the nearly 40,000 children who die every year in Yemen before their fifth birthday," the report said.

Fractious Yemen has remained in turmoil since September of 2014, when Shia Houthis overran the capital Sanaa and other parts of the country.

Saudi Arabia said its year-long campaign in Yemen was launched in response to appeals by President Abdu Rabbu Mansour Hadi, who temporarily sought refuge in Riyadh after Sanaa fell to the Houthis.