Authorities in Georgia have reportedly launched a criminal investigation into the case of Bobby Kristina Brown, who was found unresponsive in a bathtub last weekend and has been in a medically-induced coma since.

According to TMZ, law enforcement sources say possible foul play was suspected after unspecified injuries were found on Brown, the only daughter of Whitney Houston and Bobby Brown. Boyfriend Nick Gordon is reportedly the target of the probe.

Additionally, the website says that Max Lomas, the only witness to the incident other than Gordon, gave this account to police:

We're told Max Lomas—the friend who discovered Bobbi Kristina in the tub—arrived at around 9 AM last Saturday. He says he hung out with Nick but did not see Bobbi Kristina. He was told she was in the bedroom. Nick wandered away and Max says he didn't pay attention to his whereabouts.

The cable guy showed sometime after 10 AM and Max says he let him in—Nick was nowhere to be seen. The cable guy said he needed access to the bedroom so Max let him in and discovered Bobbi Kristina in the tub. He screamed for Nick, who ran in and administered CPR.

We're told Max claims Nick allegedly cleaned up the home and removed blood stains.

Lomas has refused to be reinterviewed until authorities offer him immunity, TMZ reports.

UPDATE - 11:40 a.m.: CNN has also spoken with a source who says police are investigating Nick Gordon. Additionally, a source reportedly told the network that Bobbi Kristina Brown "has injuries that still need to be explained."

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