Two children were killed on Tuesday in a blast by a Houthi-laid landmine in Yemen's Red Sea port city of Hodeidah, a government official said.

The two children who were heading back to their residential house died in Hodeidah's district of Tuhyata as a result of the explosion of a landmine laid previously by the Houthi rebels, the local official said on condition of anonymity.

"Landmine explosions are happening every two to three days in different areas of Hodeidah affecting innocent civilians," the source noted.

Meanwhile, another source of Hodeidah's pro-government authority said many victims including child survivors of mine and other explosive accidents are in a pressing need to get assistance from humanitarian organizations.

"Some children survived explosions of landmines laid by Houthis in Hodeidah but were left amputees without long-term support," the source said, also on condition of anonymity.

"The suffering of families having child amputees are doubled and became unbearable and there must be an a humanitarian interference to help them," he said.

The Houthi-laid landmines and IEDs continue to pose a real threat to the civilians despite the ongoing efforts in the mine-clearing projects in Yemen.

Previous reports by humanitarian organizations said Yemen has become one of the largest landmine battlefields in the world since World War II.

The Iran-allied Houthi rebels seized the northern provinces including the capital Sanaa in late 2014, forcing Yemen's President Abdu-Rabbu Mansour Hadi and his government into exile.

An Arab coalition led by Saudi Arabia intervened militarily in the Yemeni conflict to fight against the Houthis in March 2015, in response to an official request from Hadi to protect Yemen.