A third WestJet flight was targeted by a threat this week, but Saskatoon police have determined there were no explosives on Flight 323 from Toronto to Saskatoon.

​Flight 323 landed safely at the John Diefenbaker airport in the Saskatchewan city on Tuesday night after receiving the bomb threat at about 7 p.m. CT. All 113 passengers and five crew members were able to leave the aircraft safely using the stairs. They were then boarded onto a bus.

Police said the investigation is continuing. There have been no arrests.

Robert Palmer with Calgary-based WestJet said in a statement to CBC News: "We understand and appreciate the interest in the story. We've said all we can say at this point and will leave matters in the hands of police as it is now an active criminal investigation."

Passengers and first responders crowd the runway of the Saskatoon airport after WestJet flight 323 landed due to a bomb threat. (Submitted by Marc MacLeod)

Passengers and crew were interviewed and debriefed by Saskatoon police members, according to police spokeswoman Kelsie Fraser.

We received a bomb threat for <a href="https://twitter.com/hashtag/WS323?src=hash">#WS323</a> (Toronto-Saskatoon) tonight. The aircraft has landed safely in Saskatoon. —@WestJet

There has been a recent rash of threats for WestJet and Air Canada: