Investigators have allegedly found human remains while searching for the friend of the killed Gabby Petito.

In addition, objects belonging to the 23-year-old were discovered, said an FBI investigator on Wednesday afternoon (local time).

These things were found in the Carlton Reserve in Florida in an area that was until recently under water.

"I know you have a lot of questions, but we don't have an answer to everything," the officer said.

The 22-year-old Gabby Petito had not returned from a trip through the USA with her boyfriend in the summer. The case is attracting attention both in America and internationally - not least because the Florida couple shared numerous pictures and videos from their trip on social networks. After an intensive search, Petito's body was finally found in September in the state of Wyoming. According to the coroner, the young woman was strangled.

Petito's friend had returned from traveling with Petito in September alone.

Shortly afterwards he also disappeared without a trace.

The police have been looking for the 23-year-old for weeks - especially in the nature reserve where the objects and the alleged human remains have now been found.

Why the journey of the couple, who looked happy in pictures, came to a fatal end is open.