"Disappearing" Arrivals

[Peter H.]

Was out do a bit of spotting on Sunday 11 Sep.

Three arrivals that I noted (international flights) were directed to turn right off 34L after landing. These were 2 Qantas (including QF 6) and Singapore flight 251.I did not see them cross the runway again to head to T1 or did not see one SQ tail parked there later

Is there an explanation from someone

Thanks folks