WA police went to a Cloverdale home on Wednesday and found the children, aged four and six, who had allegedly been left alone since Tuesday.
“It will be alleged both parents were overseas at the time the officers entered the property,” police said in a statement on Saturday.
“The children were subsequently removed from the property and placed into appropriate care.”
WA Child Protection Minister Andrea Mitchell said the children were in the hands of departmental officials.
“When I first heard about this situation I was horrified,” Ms Mitchell told reporters.
“Any specific chance where there’s children of this age, or in fact any age, being left alone, is extremely concerning.
“This incident serves as an example of where the community actually takes a role in looking after and safe guarding children as well.
“The safety of children is the responsibility of all of us.”
The mother was arrested at the airport on Thursday after she arrived on an inbound flight and was detained by Border Force officials.
She is due to appear in the Perth Magistrates Court on June 22.
Originally published as Perth woman charged over home alone kids