Dive teams continued the search Friday for a missing Winnipeg mother following the deaths of her two children on July 24.

Officers have been looking for Lisa Gibson, 32, since Wednesday.

Her two-year-old daughter and three-month-old son were rushed to hospital that day from their Coleridge Park Drive home in Winnipeg's Westwood neighbourhood but couldn’t be revived.

They’re believed to have drowned in the bathtub.

Autopsies on the two children have been completed but officers aren’t releasing the results due to the ongoing investigation, said police.

Officers said Gibson is a person of interest in their deaths.

A police source told CTV News that Gibson had been dealing with postpartum depression.

Officers have been searching the neighbourhood and the Assiniboine River near her home.

Const. Eric Hofley said police are still hopeful Gibson is alive but had to explore the possibility that she might be in the river.

"We're always hopeful that Ms. Gibson will be located safely but, having been two days since she was last seen, it's time to at least expand the scope," he said. "We're certainly not giving up on finding her safely alive, but it's time to look at other possibilities and thus the dive unit being used."

A vigil was held by a group of mothers Thursday night with community members voicing support for the family.

Outside the Gibson’s home, a memorial has been growing with people leaving flowers and teddy bears.

“Just want to give our support to the family and share the sorrow with everybody,” said Charmaine Palka.

A cousin to the Gibson family spoke to CTV News but didn’t want his name used. He said the family is “hanging in there” but doesn’t want to speak publicly to media at this time.

Police said they received more tips Friday from people who have seen someone matching Lisa Gibson’s description, but no confirmation that any of them are actually her.

Officers said as long as tips come in, they’ll continue to pursue them.

Anyone with information can call investigators at 204-986-6508 or Crime Stoppers at 204-786-8477.

- with a report from Alesia Fieldberg and files from The Canadian Press