The partner of US influencer Ashly Robinson, who died last week while on holiday with him on the Tanzanian islands of Zanzibar, has had his passport withheld, the local police said in a statement.

Joe McCann, 45, is understood to be speaking to police as a witness. No arrests have been made, and the police had previously told local media that McCann was not suspected of wrongdoing.

Zanzibar's police had earlier told the BBC that Robinson, 31, known online as Ashlee Jenae, had attempted to take her own life. McCann has not made any public statement on the matter.

In a US interview, Robinson's parents said her death in Tanzania doesn't make any sense and were seeking answers. Investigations into the case are ongoing, including awaiting the official medical examination report from doctors, the police said.

Robinson had been found unconscious in her villa and taken to hospital, where her death was confirmed hours later, her family said in a statement issued on Sunday.

In an interview with the BBC's US media partner CBS News, Robinson's parents described their daughter as a light and a beautiful person who was supposed to be happy. She had just celebrated her birthday and had got engaged during the trip, and then she is just gone, her mother, Yolanda Endres, said.

The parents expressed confusion over how the situation could change so drastically. They revealed they heard from McCann 11 hours after the incident that supposedly led to Robinson's death and did not get a lot of detail. They were later informed by Zuri Zanzibar, the hotel where the couple had been staying, that she had died.

Zanzibar's North Unguja police chief Benedict Mapujira stated that the couple were reported to have had a misunderstanding, prompting Zuri Zanzibar's management to separate them into different rooms. However, the hotel did not confirm the details provided by the police.

Mapujira told the BBC that the case was reported late last Wednesday after hotel staff raised the alarm over a guest suspected to be suicidal. [Robinson] was then taken to hospital for treatment that night, but she passed away the following day (9 April), he said.

In a statement, Zuri Zanzibar expressed deep sadness over the tragic incident involving one of our guests and noted they were cooperating with authorities and the US embassy but declined to comment further citing privacy concerns. Robinson's parents are also cooperating with the investigation as it continues.

Days before her death, Robinson had posted photos and videos from her trip, including one taken at a zoo in Tanzania's northern region of Kilimanjaro. Her Instagram followers have been sharing condolence messages.