Most of the deaths were along the Shabelle River, Dr Sa’iid Mo’alin Siyad said.
“Children pay the price for war when insecurity cuts them off from access to the most basic health services,” he said.
The death toll was also confirmed by Ibrahim Kulow, a district official in southern Somalia, who spoke to a local Shabelle radio station.
Somalia has one of the highest infant and under-five mortality rates in the world. The country has had no effective government since 1991, when warlords ousted a dictatorship and then turned on each other, carving the nation of an estimated 8,2 million people into a patchwork of fiefdoms.