UPDATE: A two-year-old son of Minnesota Vikings running Adrian Peterson has died in South Dakota on Friday
10:16 AM PT -- Multiple sources tell TMZ ... Peterson's son is currently on life support and hasn't had brain activity since 5:30 PM last night.
We're told the family is monitoring the situation closely, and if there is no improvement in 24 hours, the mother wants to remove life support and donate the boy's organs to people in need.
10:00 AM PT -- Adrian Peterson's father has confirmed ... the injured boy is, in fact, Adrian's son ... but it's NOT Adrian Peterson Jr.
The Pioneer Press spoke with Nelson Peterson ... who says, "All I can say is, we are asking for prayers and for respect for our family as we deal with this tragic situation."
8:41 AM PT -- Multiple sources with direct knowledge of the situation tell TMZ ... the injured child is Adrian's son, but it's not Adrian Peterson Jr., the child he's been famously photographed with in public over the years.
The name of the boy and his mother have not been publicly released, though later updates and a report from sources on AnyJoe.com named Ann Ashley Doohen as the mother of the toddler who passed away. This news has not been made official in any capacity.
Two-year-old son of Minnesota Vikings running Adrian Peterson. Photo Via Facebook.
Peterson also had a longtime girlfriend, Ashley Brown, who he dated throughout high school and beyond. They reportedly have the daughter together, Adeja.
***A woman in Sioux Falls who is close to the mother involved told CityPages that the mother of the child had a casual relationship with Adrian Peterson when she lived in the Twin Cities but had since moved to South Dakota.
She wasn't clear as to who the father was until very recently after a paternity test revealed that Peterson was the dad.
The child goes by his mothers' last name and the father isn't identified on the birth certificate.
Peterson knew that he was the father of the child before this week's tragic incident.****
The Minnesota Vikings running back immediately left his team to be with his son.
Officials tell us they've arrested the suspect, 27-year-old Joseph Patterson ... who's been charged with aggravated felony assault and battery of an infant.
Joseph Robert Patterson
Offender -Joseph Robert Patterson Via Facebook
According to law enforcement, emergency responders arrived to the apartment where Peterson's son was living at 5:46 PM on Wednesday ... and found the child unresponsive.
He was rushed to a nearby hospital and medical experts determined the injuries were consistent with abuse.
Law enforcement sources tell us ... the child suffered severe head injuries.
The suspect, Joseph Patterson, appeared in court just moments ago ... the judge set his bond at $750,000. Patterson tried desperately to shield his face from the cameras.