Video footage has emerged of two Iowa cousins who went missing on Friday, July 13.

ABC News has obtained the footage of 8-year-old Elizabeth Collins and her 10-year-old cousin, Lyric Cook, riding their bikes on the same day they went missing. It lasts just a few seconds.

"It looked kind of grainy, I mean just zoom they were by the thing and so it's very hard to really make much out of the thing," Black Hawk County Chief Deputy Rick Abben said. "The girls were less than a block from the house when this camera captured them riding by, important to note they were riding away from Meyers Lake."

Investigators are examining the footage for clues that could lead to the discovery of the missing girls who, authorities say, were abducted twelve days ago after riding their bikes near Meyers Lake in Evansdale.

The children's grandmother, who was babysitting the cousins when they disappeared, told the AP she has no idea how they ended up across town by a lake.

Earlier this week, ABC reported that the families of the two cousins remain hopeful.

"They told us they do have a couple of leads and that is it. Anything is hopeful," Heather Collins told ABC News' Robin Roberts.

On Saturday, the AP reported that authorities still believe the girls are alive.

"We believe these girls are alive, and we are not discouraged by the passage of time since their disappearance," FBI spokeswoman Sandy Breault said. "We are urging anyone with information to come forward. Any information, as insignificant as it may seem, could be vital to this investigation."

Cook's parents, Misty and Daniel Morrissey, have criminal records relating to methamphetamine, and Daniel Morrissey has been eyed by family members as a suspect in the girls' disappearance.

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  • Lyric Cook, Elizabeth Collins

    This combo made from undated photos provided by the FBI shows cousins Lyric Cook, 10, right, and Elizabeth Collins, 8, who have been missing since Friday, July 13, 2012. Dan Morrissey, Lyric's father, is expected to learn Friday, July 27, whether he will be put on trial next week for domestic abuse or drug charges, raising the possibility that he could be sent to prison even as the search continues. (AP Photo/FBI)

  • Elizabeth Collins

    This photo provided by the FBI shows Elizabeth Collins, 8. Collins and her 10-year-old cousin Lyric Cook, who have been missing since Friday afternoon, July 13, 2012, when they went for a bike ride in Collins' neighborhood in Evansdale, Iowa. Their bikes were found a mile away near a lake, and investigators say they have no idea what happened to them. (AP Photo/FBI)

  • Lyric Cook

  • Elizabeth Collins, Lyric Cook-Morrissey

  • Misty and Dan Morrissey speak to the media near Meyers Lake where their daughter Lyric Cook-Morrissey, 10, and Elizabeth Collins, 8, disappeared last Friday, Tuesday, July 17, 2012, in Evansdale, Iowa. The girls' bikes were found Friday afternoon near a bike trail at the edge of the lake. (AP Photo/Charlie Neibergall)

  • Misty and Dan Morrissey walk to speak to the media near Meyers Lake where their daughter Lyric Cook-Morrissey, 10, and Elizabeth Collins, 8, disappeared last Friday, Tuesday, July 17, 2012, in Evansdale, Iowa. The girls' bikes were found Friday afternoon near a bike trail at the edge of the lake. (AP Photo/Charlie Neibergall)

  • Dan Morrissey leans on a tree near Meyers Lake where his daughter Lyric Cook-Morrissey, 10, and Elizabeth Collins, 8, disappeared last Friday, Tuesday, July 17, 2012, in Evansdale, Iowa. The girls' bikes were found Friday afternoon near a bike trail at the edge of the lake. (AP Photo/Charlie Neibergall)

  • Elizabeth Collins

    This undated photo provided by Black Hawk County police shows 8-year-old Elizabeth Collins, who, along with her 10-year-old cousin Lyric Cook-Morrissey, has been missing since Friday afternoon, July 13, 2012. The girls were last seen Friday afternoon leaving their grandmother's house. (AP Photo/Black Hawk County Police via Waterloo Courier)

  • This undated photo provided by Black Hawk County police shows 10-year-old Lyric Cook-Morrissey who, along with her 8-year-old cousin Elizabeth Collins, has been missing since Friday afternoon, July 13, 2012. The girls were last seen Friday afternoon leaving their grandmother's house. (AP Photo/Black Hawk County Police via Waterloo Courier)

  • Sarah Staebell ties pink ribbons for Cook-Morrissey and Collins. (AP Photo/Waterloo Courier, Brandon Pollock)

  • Police officers check a lower-level door of a business in Evansdale Monday, July 16, 2012 in the continuing search for Lyric Cook-Morrissey, 10, Elizabeth Collins, 8, who disappeared in Evansdale last Friday, July 13. (AP Photo/Waterloo Courier, Brandon Pollock)

  • An off-duty Cedar Rapids police officer searches the underbrush for clues to the disappearance of Lyric Cook-Morrissey and Elizabeth Collins along the bike trail around Meyers Lake in Evansdale Monday, July 16, 2012. The two girls have been missing since leaving their grandmother's house Friday afternoon. (AP Photo/Waterloo Courier, Brandon Pollock)

  • This photo provided by the FBI shows Elizabeth Collins, 8. Collins and her 10-year-old cousin Lyric Cook have been missing since Friday afternoon, July 13, 2012, when they went for a bike ride in Collins' neighborhood in Evansdale, Iowa. Their bikes were found a mile away near a lake, and investigators say they have no idea what happened to them. (AP Photo/FBI)

  • A poster with photos of Lyric Cook-Morrissey, 10, and Elizabeth Collins, 8, who disappeared in Evansdale last Friday, adorn a utility pole across from the entrance to Meyers Lake in Evansdale, Iowa, Monday, July 16, 2012. Their bikes were found Friday afternoon near a bike trail at the edge of Meyers Lake in Evansdale. (AP Photo/Waterloo Courier, Brandon Pollock)

  • Evansdale code enforcement officer Rick Reuter watches as Meyers Lake is drained while authorities continue to search for 10-year-old Lyric Cook-Morrissey and her cousin, eight-year-old Elizabeth Collins, who disappeared last Friday, July 13, 2012, in Evansdale, Iowa. (AP Photo/Waterloo Courier, Matthew Putney)