By the
CNN Wire Staff
Updated 5:34 AM EST, Wed January 11, 2012
Missing toddler's grandma speaks.
Waterville, Maine (CNN) -- Dive teams in Maine will scour the Waterville area Wednesday as the search for a missing 21-month-old girl continues, authorities said.
"The bodies of water to be searched have been selected by the warden service, and the divers will enter the water during the morning and continue through the afternoon," according to a statement by the Maine Department of Safety.
The search for Ayla Reynolds is in its fourth week. Police have said they suspect foul play in the case.
Ayla's parents are not married and don't live together. Her mother recently completed rehab, family members have said. Investigators have said both families have cooperated with police.
Justin DiPietro said he put his daughter to bed at 8 p.m. December 16 and called police the next morning just before 9 a.m. to report her missing, according to authorities.
DiPietro's mother, Phoebe DiPietro, told CNN she wasn't at the home the night Ayla disappeared. But she said she fully supports her son, who has said he "would never do anything to harm my daughter." She said she just wants her Ayla returned unharmed.
"I'd give everything I owned if we can have her back," she said last week, her voice breaking.