Drew Collins and Heather Collins (center), parents of missing girl Elizabeth Collins, are prayed for during a vigil held for Elizabeth and her cousin, Lyric Cook-Morrissey, at Heartland Vineyard Church Monday in Cedar Falls. The girls have been missing since July 13. (AP Photo/Waterloo Courier, Matthew Putney)

The grandmother who was babysitting two Iowa cousins when they disappeared more than a week ago while riding bikes says she has no idea how they ended up more than a mile away by a lake.

Wylma Cook said Tuesday told the Associated Press Tuesday that Lyric Cook and Elizabeth Collins occasionally rode bikes while she was babysitting them at Collins’ home in Evansdale but usually stayed close. Cook says she’s baffled how their bikes ended up near Meyers Lake because “they never rode that far.”

Cook says Lyric knew she had to return shortly because they were planning to leave to return to their home in Waterloo. She says she expected the girls to come back for drink of water or juice as they always did on hot days.

Elizabeth Collins (left), Lyric Cook-Morrissey