The National Center for Missing and Exploited Children is asking for help in locating two missing girls believed to have been abducted by their father in Missouri. Officials believe the three may be headed toward Montana, possibly traveling in a 1990 Dodge Caravan. If you have any information about the whereabouts of 7-year old Abby Chapman, her 3-year-old sister Isabella, or their father Matthew Chapman, you are asked to contact the US Marshal Service in Missouri at 1-417-831-0588, or call the center's tipline at 1800-843-5678. Here are the photos and information from the Center's website

ABBY CHAPMAN
Case Type: Family Abduction
DOB: Jun 14, 2004 Sex: Female
Missing Date: Jul 10, 2011 Race: White
Age Now: 7 Height: 4'0" (122 cm)
Missing City: EXETER Weight: 45 lbs (20 kg)
Missing State : MO Hair Color: Brown
Missing Country: United States Eye Color: Blue

ISABELLA K. CHAPMAN
Case Type: Family Abduction
DOB: Oct 30, 2007 Sex: Female
Missing Date: Jul 10, 2011 Race: White
Age Now: 3 Height: 3'0" (91 cm)
Missing City: EXETER Weight: 40 lbs (18 kg)
Missing State : MO Hair Color: Blonde
Missing Country: United States Eye Color: Blue
Case Number: NCMC1176182

MATTHEW JUSTIN CHAPMAN
(Abductor)
Case Type: Family Abduction
DOB: Oct 15, 1975 Sex: Male
Missing Date: Jul 10, 2011 Race: White
Age Now: 35 Height: 5'11" (180 cm)
Missing City: EXETER Weight: 170 lbs (77 kg)
Missing State : MO Hair Color: Blonde
Missing Country: United States Eye Color: Green
Case Number: NCMC1176182