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Dallas police killer 'prepared larger attack'
The man who shot dead five police officers in Dallas and wounded seven more was planning an even larger attack
People have placed flowers and candles on the spot where the police officers were shot
Micah Johnson, 25, was angry with the recent killings of black men by police and wanted to kill white officers, the BBC reports citing US police.
Speaking to CNN, police chief David Brown said that Johnson, a military veteran, appeared to have practised detonating explosives.
Brown also said police were trying to find the significance of the letters 'RB' that Johnson had written in his own blood, near where he was killed by a remote detonation by police.
Officers were also reportedly reading a journal found in Johnson's house that Brown said was proving "hard to decipher".
Johnson targeted police in Dallas on Thursday as a protest was taking place against the deaths of black men at the hands of police.
A makeshift shrine in memory of the five officers who lost their lives in the attack sprang up outside police headquarters in the Cedars district of the city reportedly within hours.
