Media playback is unsupported on your device Media caption Aleem Maqbool reports: ''In the chaos, there were shots fired''

Missouri governor Jay Nixon has criticised police for releasing CCTV footage which apparently shows shooting victim Michael Brown stealing.

He said the release of the footage nearly a week after a policeman shot Mr Brown in Ferguson, St Louis, "appeared to cast aspersions" on the dead man.

"It made emotions raw," Mr Nixon told US broadcaster ABC on Sunday.

Media playback is unsupported on your device Media caption Governor Jay Nixon: Release of CCTV footage "had an incendiary effect"

US Attorney General Eric Holder has ordered a federal post-mortem on the black teenager's body.

Riot police used tear gas and smoke bombs to disperse protesters overnight as they defied a curfew in Ferguson. The curfew is being extended for a second day, beginning at midnight (05:00 GMT Monday) and running for five hours.

The killing of Mr Brown by a white policeman in a street on 9 August has inflamed racial tensions in the largely black suburb.

It caused dismay across the US, with peaceful nationwide vigils held on Thursday night, while images of riot police deployed in an American city suburb have made headlines worldwide.

'Gunned down'

The video "appeared to cast aspersions on a young man that was gunned down in the street", said Governor Nixon.

On Saturday, he declared the curfew after looters targeted stores in Ferguson overnight.

Media playback is unsupported on your device Media caption Mr Brown's family condemned the release of CCTV footage by local police

Seven arrests were made as police used smoke bombs and tear gas to disperse a crowd of about 150 in Ferguson, after being called to the scene of a disturbance at a restaurant after the curfew started.

A police car reportedly came under fire and a person was hurt in an apparently unrelated shooting in the same area.

As police were nearing the restaurant, a man with a handgun went into the street but ran away, AP news agency reports.

Image copyright Getty Images Image caption Protesters in Ferguson, St Louis, on Saturday night

Image copyright AFP Image caption Protesters in Ferguson, St Louis, on Saturday night

Image copyright AFP Image caption Protesters in Ferguson, St Louis, on Saturday night

Image copyright EPA Image caption Police in Ferguson, St Louis, on Saturday night

Someone also shot at a police car but it was not clear if it had been hit.

In the same area, a person was shot and critically wounded and police were searching for the attacker.

Demonstrators complained that the curfew would make matters worse.

Jayson Ross, who was leading the protesters toward the police before tear gas was fired, was quoted as saying by AP: "They got guns. We got guns. We are ready."

Local politician Antonio French, who was with the protesters, tweeted to say: "Too many young men talking about they're ready to die tonight."

Autopsy moves

The US justice department is investigating the shooting of Mr Brown, with 40 FBI agents dispatched to Ferguson to gather information.

The justice department said on Sunday that Mr Holder had ordered a federal post-mortem examination at the request of Mr Brown's family, in addition to a Missouri state autopsy.

Image copyright Other - Facebook Image caption Michael Brown had recently graduated from high school. His family said their son was not "perfect"

A preliminary autopsy by the St Louis County Medical Examiner's office on the day after Mr Brown's death found he had been shot, police said, without disclosing how many times.

Earlier, the lawyer for the dead teenager's family, Anthony Gray, announced that it had hired one of America's most famous forensic pathologists, Michael Baden, to conduct an independent examination.

Mr Baden, 80, has worked on investigations into the deaths of such public figures as President John F Kennedy, the punk star Sid Vicious and the family of the last Russian emperor, Tsar Nicholas II, according to a profile on Fox News, where he works as a TV host.

Ferguson police chief Thomas Jackson revealed on Friday that the officer who shot Mr Brown was Darren Wilson, a six-year police veteran with no previous complaints against him.

Mr Wilson has been on paid administrative leave since the shooting.

The policeman had reportedly stopped the teenager for walking in the street, disrupting traffic.