helps find an american mother of seven believed to have been kidnapped in mexico. we need our mom back. we miss her. we miss her terribly. reporter: zonia lopez tells abc news her family has already been asked to pay a ransom for return of her mom, maria del carmen lopez, who she believes was the victim of a coordinating kidnapping in early february. witnesses told the family they saw a white van in front of lopez s home in the state of colima, lopez said. there was an exchange of words. she was refusing to get into the van, there was another individual who stepped out of the van and helped those two bring her inside and they drove away. reporter: no one has seen or heard from her mom since. just last month, four other american citizens were also kidnapped in mexico. two of them were killed. can now the u.s. state department is issuing a travel advise ray, ing americans not to trave six threats of crime and kidnapping.
American citizen Maria del Carmen Lopez, who was kidnapped in Mexico, according to the FBI, was last seen being forced into a white van, her daughter says.