The human rights group Amnesty International says it has received credible and disturbing evidence that Nigerian security forces shot and killed at least 12 people taking part in peaceful protests last night in the country's largest city, Lagos.

For weeks now, there have been demonstrations against police brutality across Africa's most populous country.

Protesters accused the now disbanded special anti robbery squad, or SARS, of torture.

Nigeria's president has appealed for calm, while the army has denied any involvement on indefinite curfew has been imposed on several regions, including Lagos, from where our correspondent McKinney Jones sent this report.

A city in chaos Across Lagos, buildings have been torched on sporadic clashes have erupted.

This'll is what sparked the outcry.

Yeah, soldiers shooting unarmed protesters in the country's largest city.

They are shooting our talk.

They are shooting.

What happened here on Tuesday night has deeply unsettled Nigerians.

This is not the first time the army has been accused of shooting innocent protesters, but the fact that it happened here in what was one of the most peaceful protest sites in NCR's has ignited on already volatile situation.

Let's go!

What started off as a protest against police brutality has widened to calls for change in the status quo on inequality Way.

The pro were suffering square way are doing our process.

Nobody was even art.

We already law.

Why must they say soldier to Hamas if they can put this nation in other, let us stop aside lets you take over this nation in order with a betterment off this nation.

This'd protest that was born on social media.

These are people.

More than half of the country is under 24.

Last night's events were broadcast online on the NCL's hashtag has galvanized support.

I would say the Indian government, You guys are ashamed to the world for killing your own citizens.

Sending military to the street toe kill on um, full protesters because they're protesting for the right.

It's are called for.

When I get on Nigeria's Bean, a dictatorship for almost half of its life as an independent nation, many of its citizens worry choose.

These events echoed the dark days off military rule on their determined to make sure that doesn't happen.