This story has been updated with additional information as it was made available.
The McKinney Police Department has issued AMBER alerts for 9-year-old Jessica Burns and 6-year-old Jennifer Burns.
The two have been missing since Jan. 19, according to the alert.
Jessica Burns is described as a 9-year-old white female, 4-feet-10-inches high and 90 pounds with blonde hair and blue eyes. She was last seen wearing dark frame glasses, a red long sleeve shirt with black shoulders/sleeves and blue jeans.
Jennifer Burns is described as a 6-year-old white female, 4-feet tall, 60 pounds with blonde hair and blue eyes. She was last seen wearing purple frame glasses, a light blue shirt with sparkle designs on the front and blue jeans.
According to the alert, police are also looking for Jame Burns, a 60-year-old white female, in connection with the abduction. Jame Burns is described as 5-feet-2-inches tall, 230 pounds with blonde hair and brown eyes. Jame Burns was last seen wearing black clothing.
Police have said they believe Jame Burns is driving a 2009 Black Ford Escape, with Texas plates MTC6093.
The suspect was last seen in McKinney. Law enforcement officials believe these children to be in grave or immediate danger, the alert stated.
"If you have any information regarding this abduction, call the McKinney Police Department at 972-547-2700," the alert states.
The McKinney Police Department released its own statement at 8 a.m. the morning of Jan. 20.
"We have reason to believe they are in serious danger," the department stated.
The department stated that the girls are suspected of being taken by Jame Burns, their grandmother.
"The girls were last seen just before six last night at a restaurant near Central Expressway and Virginia Parkway, where they had been having a supervised visit with their non-custodial father, along with CPS, who had temporary custody of the girls," the department stated. "The CPS worker called the police and when our Officers arrived, the father, Justin Burns (DOB 1-15-89) was taken into custody, as we do believe he was involved in their disappearance. He is in the Collin County Jail and is being held on two counts of kidnapping, which are felonies."
Burns is driving a black SUV with a scratch on the front, silver door handles, and a black interior, police said.
According to Collin County court records, there are three warrants filed for Jame Burns's arrest, including two on kidnapping charges filed Jan. 20.
McKinney detectives are currently working with the FBI to locate the girls. Anyone with information is asked to call 9-1-1.