The investigation into the disappearance of 8-month-old Amiah Robertson continued Wednesday with a search of White River on the near westside, Indianapolis Metropolitan Police said.

Officers responded to the area of West McCarty Street near the river just after 4:40 p.m. They'd received a tip about some potential evidence related to the case, IMPD Sgt. Jim Gillespie told IndyStar.

Authorities found some items along the shoreline that could possibly be related to the child's disappearance, but Gillespie says police need to analyze the items further.

"It’s inconclusive at this time," he said.

Divers searched the water but did not recover anything, Gillespie said.

FBI assisting in the case

The FBI confirmed Wednesday that it is assisting police in the investigation. A spokesperson told IndyStar that IMPD is leading the investigation and declined to comment further.

Detectives are still seeking the public's help in finding Amiah Robertson, who was last seen March 14 at a home in the 200 block of South Holmes Avenue, according to IMPD officials. The child was reported missing on March 16.

Police issued a Silver Alert on Tuesday and then suspended it later that night "due to very few tips coming in on that specific hotline," according to an IMPD press release. Officers also obtained a warrant and searched the west-side residence. The Indianapolis-Marion County Forensics Services Agency responded as a precautionary measure, according to authorities.

Rumors about the investigation have been circulating on social media since the child was publicly declared missing. Police on Tuesday asked people to stop spreading "inaccurate reports."

"We monitor social media and we look for those tips," Gillespie told IndyStar. "Each one we follow up on. ... We don’t know if it's going be true and accurate or not, so that draws resources away from the investigation and puts it on stuff that’s completely unverified, so it’s impeding the investigation in that way."

What to know:The difference between Amber and Silver Alerts

Police said Amiah has brown hair, blue eyes and weighs about 13 pounds.

Anyone with information about Amiah's whereabouts is asked to contact IMPD at 317-327-3811 or Crime Stoppers of Central Indiana at 317-262-TIPS.

What we know:About the disappearance of Amiah Robertson

Real news, brought to you by real Hoosiers. Support our local journalists.

Contact IndyStar reporter Crystal Hill at 317-444-6094 or cnhill@gannett.com. Follow her on Twitter: @crysnhill.