The official search for missing Clearwater, B.C., teacher Courtney Buck has been called off after four days.

A massive search from the air, on land and on the North Thompson River has failed to come-up with the body of the pregnant 30-year-old.

But it doesn’t mean the search is over, said RCMP Cpl. Dan Moskaluk.

"In the interim, when the river conditions change and we can get back out there in earnest for actual physical searches again, our file remains open with Courtney Buck presumed drowned."     

Buck was with her husband, Skye Buck, when their car plunged into the river near Clearwater on Sunday.

His body was recovered from inside the vehicle Tuesday.