Black teenager 'shot dead by police in St Louis'

A black teenager has reportedly been shot dead by police in the same city where the killing of Michael Brown sparked protests.

US media say the 18-year-old was killed at a petrol station in the St Louis area of Missouri.

Scene in St Louis after another young black man shot dead #AntonioMartin #Berkeley #Ferguson http://t.co/UC6PFTswsJ http://t.co/pu6IX4qxYh

— The Independent (@Independent) December 24, 2014

Social media users have posted photos of crowds forming at the scene where a police cordon has been set up around the forecourt, which is in the suburb of Berkeley.

Police clash with protesters in Berkeley, near #Ferguson after black teen #AntonioMartin reportedly shot dead. pic.twitter.com/uqAxXvd7Kf

— Channel 4 News (@Channel4News) December 24, 2014

The victim has been unofficially identified as Antonio Martin.

.@stlcountypd statement on #AntonioMartin shooting. (Screenshot via @JohnHenryKSDK) pic.twitter.com/oe2MkkP7b2

— The Big 550 KTRS (@KTRS550) December 24, 2014

Berkeley is the neighbouring suburb to Ferguson where Michael Brown was killed by white police officer Darren Wilson on 9 August.

His death led to protests across the US and worldwide and a debate about the US police's use of force.