Austin bombings: Who has been targeted in series of attacks, are they hate crimes and who is behind the explosions

A fourth explosion in less than a month has hit Austin, Texas, with police hunting for what they believe to be a "serial bomber" or bombers with all of the incidents believed to be linked. Police have appealed for video surveillance footage from residents and called on them to stay clear of any suspicious packages. Austin Police Chief Brian Manley asked the city 'to have an extra level of vigilance and pay attention to any suspicious device whether it be a package, a bag, a backpack, anything that looks out of place and do not approach it'.
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