A large explosion has struck the centre of the Somali capital, Mogadishu, eyewitnesses say.
Local media say the blast, suspected to be from a car bomb, took place in Howlwadag district.
A school in the area has collapsed, with children feared to be among the casualties, local journalists say.
Somalia is regularly targeted by militants from al-Shabab, which wants to overthrow the country’s internationally-backed government.
One witness told Reuters of a loud blast and smoke rising from the site.