The Theme Park Ride Where 4 People Died in Australia Is Also Popular in the U.S.

Some of the biggest amusement parks in the U.S. boast river rapids rides similar to the popular water attraction in Australia where four people died on Tuesday.

Two women and two men, between the ages of 32 and 42, died on the Thunder River Rapids ride in Dreamworld in Queensland after a malfunction caused two of the passengers to be thrown from their raft while another two were stuck inside of it, authorities said.

It’s unclear what caused the accident, which is under investigation.