DES MOINES, Iowa (AP) - An FBI dive team using sonar equipment is preparing to search a northeast Iowa lake for evidence of two missing cousins who disappeared nearly a week ago.

FBI spokeswoman Sandy Breault (broh) says the team is will begin the search of Meyers Lake in Evansdale around 6 a.m. Friday.

Authorities stopped draining the lake Thursday because the team's sonar equipment needs at least 6 feet of water to function properly. They previously said they wouldn't finish draining the lake until Friday.

The dive team is equipped to go into the deepest parts of the lake, which may be as deep as 20 feet.

Eight-year-old Elizabeth Collins and 10-year old Lyric Cook-Morrissey were last seen Friday leaving a house in the Waterloo suburb where their grandmother was watching them.