At least 180 Kenyan troops were killed when al-Shabab attackedtheir base last month, Somalia's president has said.
Kenya's army said the number was untrue, but again refused to give its own casualty figures for the assault in the southern Somali base of el-Ade.
The Islamist militant group said it had killed about 100 Kenyan troops.
If it is confirmed that 180 troops were killed, it would be al-Shabab's deadliest assault since it was formed nearly a decade ago.
Its previous most deadly attack was the killing of 148 people in the day-long assault on Garissa University College in north-eastern Kenya last April.
Somalia's President Hassan Sheikh Mohamud gave the death toll of 180 in an interview with a Somali television station, while defending his attendance at a memorial for the soldiers in Kenya.
Some Somalis accused him on social media of showing greater concern for the killing of Kenyans than his own nationals.