NAIROBI, Kenya, Nov. 30 — Hundreds of demonstrators in Khartoum, Sudan’s capital, poured into the streets on Friday demanding the execution of a British teacher who was convicted of insulting Islam because her class of 7-year-olds named a teddy bear Muhammad.

The protesters, some carrying swords, screamed, “Shame, shame on the U.K.!” and, “Kill her, kill her by firing squad.”

They were calling for the death of Gillian Gibbons, the teacher who was sentenced Thursday to 15 days in jail. Under Sudanese law, she could have spent six months behind bars and received 40 lashes.

Despite the display of outrage, witnesses said that many of the protesters were government employees ordered to demonstrate, and that aside from a large gathering outside the presidential palace, most of Khartoum was quiet. Imams across the city brought up the case in sermons after Friday Prayer, but few of them urged violence.