Nigerian security forces have shot at Shia protesters in an area on the outskirts of the capital, Abuja, a witness has told Reuters news agency.

Some of the protesters had been throwing stones at the soldiers, the witness says.

Shia protests in Nigeria have sometimes turned deadly.

In 2016, eyewitnesses told the BBC that the army had killed dozens of members of a Shia organisation during a military crackdown.

The authorities have accused the Islamic Movement of Nigeria (IMN) of wanting to ferment an Iranian-style revolution and of being a "state within a state" - accusations IMN denies.