Queensland fisheries authorities have caught and killed two tiger sharks, but it is unclear if they are responsible for separate attacks on a woman and a little girl in the Whitsundays.
Three baited hooks were dropped in the area on Friday, with Fisheries Queensland officials catching and killing a two-metre tiger shark and a 3.3-metre tiger shark today.
"It is unclear if they were responsible for injuries caused to two swimmers this week," Fisheries Queensland said in a statement.
The state government insists killing the sharks is in the interest of public safety, despite also saying it would be impossible to determine whether they were the sharks responsible.
The sharks will be cut open and measured before being dumped at sea.
12-year-old Hannah Papps was holidaying from Melbourne with her father and sister when she received a life-threatening wound to her right leg on Thursday while swimming in shallow water in Cid Harbour.
Her attack came after Tasmanian Justine Barwick, 46, was bitten on her left thigh while snorkelling in the same area less than 24 hours earlier.
Both victims have now been transferred to hospitals in Brisbane where Hannah is in a critical but stable condition and Ms Barwick was last known to be stable.
"We would like to thank everyone who has helped and cared for Hannah, including the police, emergency services and the hospital teams," her family said in a statement on Friday.
"We ask that everyone, including the media, please respect our family's privacy during this very difficult time so we can focus our energies on Hannah's recovery."
It is the first time baited hooks have been used in the popular Whitsundays holiday destination, where the tourism industry is still recovering following Cyclone Debbie in 2017.