Somalia ? Mortar fire killed three people and wounded six in the Somali capital Wednesday after a night of street fighting left at least 11 people dead and dozens injured, witnesses and health officials said.

It was not clear who fired the mortars, witnesses said.

The fighting late Tuesday in northern and southern neighborhoods between Ethiopian troops backing Somalia’s fragile interim government and insurgents could be heard for miles. It was unclear what started the shooting.

“Tuesday night’s fighting exceeded in its intensity the recent fighting in Mogadishu,” said Mohamed Jumale, a resident of the southern neighborhood of Ali Kamin.

Somali troops backed by Ethiopian forces ousted the country’s Islamic movement from Mogadishu and other strongholds in December. Remnants of the Islamic group have vowed to wage an Iraq-style insurgency and the capital has seen of waves of violence.