Dallas shooting suspect in dead: media

The suspect in the killing of five Dallas police officers has died after during a stand-off in a parking garage, local channel NBCDFW reports.

It was first reported that the suspect had been shot dead by police, but that was later called into doubt.

At the moment it is not known whether the suspect was shot dead by the police or he died from a self-inflicted gunshot wound.

The deceased was one of the alleged perpetrators of the attack on Thursday night in Dallas, Texas, on a peaceful Black Lives Matter rally against police violence.

Six police officers were wounded as was a civilian.

The suspect barricaded himself in a parking lot and continued to exchange gunfire with police officers during negotiations, and said "the end is coming".

He had vowed to hurt and kill more police. He also said he had placed several bombs in the parking lot and in other parts of downtown Dallas.

Apart from the deceased, three other suspects are being held in police custody, including a woman who was arrested near the garage and two others who were travelling in a Mercedes car.

According to NBCDFW, a large area of downtown Dallas is in lockdown and police are investigating two suspicious packages.

Two separate bomb disposal squads were deployed to the premises where the suspicious packages were found, according to the local TV channel.