Data from the TikTok accounts of four British children who their parents believe died after attempting a challenge on the platform may have been deleted, an executive from the firm said.

The families of Isaac Kenevan, Archie Battersbee, Julian “Jools” Sweeney and Maia Walsh – all aged 12 to 14 – have sued TikTok and its parent firm ByteDance in the US in an effort to force the firm to release their children’s data.

The wrongful death lawsuit claims the four died attempting a so-called “blackout challenge”, and said they want access to their children’s account data to “get answers” about how they died.

But Giles Dennington, senior government relations manager at TikTok, told BBC Radio 5 Live “there are some things we simply don’t have”.

After the lawsuit against TikTok was filed last week, Ellen Roome, mother of 14-year-old Jools, told the PA news agency that she had been trying to obtain her son’s data from TikTok as she “just wants answers” about his death and the data was “the only piece that we haven’t looked at”.

Ms Roome said she had been “shocked” to learn that she “wasn’t entitled” to Jools’ data, and was told by TikTok that a court order was required to release it.

She is now campaigning for legislation to grant parents access to their children’s social media accounts if they die.

She told PA that it had been “horrendously difficult” to “not understand why” her son had died.

Asked why parents in these cases had not been able to access data, Mr Dennington said: “This is really complicated stuff because it relates to the legal requirements around when we remove data and we have, under data protection laws, requirements to remove data quite quickly. That impacts on what we can do.”

He added that data protection requirements to remove data “can impact on what is available” and that “everyone expects that when we are required by law to delete some data, we will have deleted it”.

He said: “So this is a more complicated situation than us just having something we’re not giving access to.

“Obviously it’s really important that case plays out as it should and that people get as many answers as are available.”

He said the social media firm has “had conversations with some of those parents already to try and help them in that”.

The lawsuit filed on behalf of the parents accuses TikTok of pushing dangerous prank and challenge videos to children to boost engagement time on the platform.