**At least 20 people are thought to have died in clashes between security forces and members of a religious sect in the northern Nigerian state of Bauchi.**Some eyewitnesses said as many as 37 people had been killed.
The fighting came after local people told authorities they were alarmed by open-air preaching by the religious sect, which is known as Kala Kato.
Such preaching was banned in the state after an uprising by another sect, Boko Haram, earlier this year.