Tributes have flowed for an Australian father-of-two who was killed after a shark attack on Saturday in Western Australia (WA). Steven Mattaboni, 38, was attacked by a 4m (13ft) shark around 10:00 local time at Horseshoe Reef, north-west of the popular Rottnest Island near Perth. He was spearfishing with friends about 1km offshore when he was bitten on the lower leg in what police described as a "horrific" attack. His friends rushed him back to shore but emergency services were not able to