Mohamed V Avenue is the main road in the capital. Photo: AFP
By BBC News
An explosion has hit a bus carrying presidential guards in Tunisia's capital, Tunis, state TV reports.
At least 11 people have been killed in the blast, the interior ministry said. The explosion took place during rush hour in a main avenue. The cause of the blast is not immediately clear.
Tunisia has been targeted by the Islamic State group, including an attack by a gunman on the beach resort of Sousse in June, killing 39 people, mostly foreign tourists.
The explosion happened when the bus was either outside or near the the former headquarters of the party of deposed President Zine El Abidine Ben Ali, reports the BBC's Rana Jawad from Tunis.
The roads in the city were already clogged up because of heavy rain and flooding, when the explosion hit the bus on Mohamed V Avenue, she says.
Mr Ben Ali was ousted in a popular uprising in 2011. Tunisia currently has secular government, which is battling militant Islamists. In March, gunmen attacked the famous Bardo Museum, killing more than 20 people.