Royal Bahamas Police Commissioner Paul Farquharson and some detectives were in Florida meeting with the Seminoles, Assistant Commissioner Reginald Ferguson confirmed. He declined to elaborate.
A spokesman for the Seminole tribe did not return phone calls seeking comment.
The Broward County state attorney's office denied news reports that prosecutors had met with Seminole police to discuss Smith's death.
"There was no meeting today; there was no meeting yesterday," spokesman Ron Ishoy said.
"We are continuing to help law enforcement agencies and the medical examiner as they try and figure out the nature of this death," Ishoy said, adding: "This is not a homicide investigation."
Smith was found unresponsive in her South Florida hotel room Feb. 8. An initial autopsy report showed no immediate indication of a drug overdose and no sign of major external injuries on the 39-year-old former Playboy playmate and reality TV star.
The release of the full autopsy was delayed last week after the Seminoles gave additional evidence to Dr. Joshua Perper, the chief medical examiner for Broward County. Perper hasn't said what the additional evidence is.
Photos: Anna Nicole Smith — Tragedy Strikes
He said Wednesday that he had not been told of any criminal probe, and that his findings would be released in about a week.
Meanwhile, attorneys for Smith's estate and a man who claims to own the waterfront home where she lived in the Bahamas met with a judge there Wednesday, but said the session did not resolve their dispute.
G. Ben Thompson, a South Carolina developer who briefly dated Smith, says he advanced her money for the $900,000 house but she did not honor an agreement to repay the debt. Smith, who lived there in the months before her death Feb. 8, claimed the house was a gift.
The former Playboy Playmate's companion, Howard K. Stern, has remained at the gated house known as "Horizons" with Smith's 6-month-old daughter, Dannielynn.
Another meeting was scheduled for Friday.
Smith was buried in the Bahamas last month next to her son, Daniel, whose death Sept. 10 there is also still under investigation.