At least 30 people have been killed in Afghanistan after floods caused by a heavy monsoon rain spell washed away homes, a disaster ministry official says.

Ministry spokesman Mohammad Shafi Rahimi said 26 of the deaths occurred in Jalrez district, 46 kilometres east of Kabul, after rain washed away hundreds of houses, most of them built of earth.

Four more people died in Kabul, and more than 70 were injured across the two districts, he said.

At least 40 other people were missing.

Afghan Taliban spokesman Zabihullah Mujahid issued a condolence message, calling on aid groups and the Kabul administration to help the bereaved families.

Last year’s monsoon flooding killed dozens of people in Afghanistan, washing away hundreds of houses and livestock.

-Reuters