Two passenger aircraft — a Jetstar and a Qatar Airways plane — came close to crashing into each other on the tarmac at Australia's busiest Sydney Airport on Sunday.

A crew member was injured and the incident has triggered a probe by the country's safety regulators.

What do we know about the near-miss collision?

The Jetstar A320 was taxiing for takeoff to the Gold Coast in the state of Queensland when its flight crew saw the Qatar Airways Boeing 777 — which was being towed by an aircraft tug — in close proximity on a crossing taxiway, the Australian Transport Safety Bureau (ATSB) said in a statement.

"Both aircraft were stopped abruptly", the statement said, leading to a Jestar cabin crew member moving through the cabin being injured and the connection between the 777 nose gear and aircraft tug suffering damage.