THE FAMILY of cancer battler Bradley Lowery have spoken of their heartbreak after doctors discovered what could be a new tumour - just as he celebrated his sixth birthday.

The latest blow came as it emerged a teenager has been interviewed by police and cautioned relating to posts on social media about the terminally-ill boy.

Bradley, of Blackhall, County Durham, who celebrated his sixth birthday last week, has been battling neuroblastoma, with his fight touching the hearts of people around the world.

His best friend Jermain Defoe, parents Gemma and Carl and more than 250 family and friends joined a party on Friday evening.

But Bradley’s family revealed another lump had been found on his neck.

In a post on Facebook his mum Gemma wrote: “This week has been crazy busy and extremely emotional.

“As you aware Bradley has been in hospital and in excruciating pain, we have found it so difficult to see our baby like this. Bradley spent his birthday in hospital and asleep most of the day as he is really not well. Myself and his daddy have spent our time rubbing his legs and comforting him the best we can.

“On Thursday we were allowed to take Bradley home, but unfortunately we have found another lump on his neck that is getting bigger very quickly and Bradley’s consultant believes it is yet another tumour.”

The family thanked everyone for Bradley’s birthday party.

The post adds: “So has you can see we have had a pretty hectic emotional heart breaking week.

“This leads me nicely into what I would like to say next. I appreciate everyone who dose any fundraising no matter how little or big, no matter how much is raised for Bradley which will now go into his foundation to support other families due to the fact there is no treatment options available for Bradley now.

“I would love to be able to thank you all individually but I’ve not got enough hours in the day, especially this week and Bradley can’t do personal thank you’s at the moment as he a very poorly little boy.”

Meanwhile, Northumbria Police said they were “made aware” of messages relating to the youngster on Friday.

A spokesman said: “A 15-year-old boy has now been interviewed under caution and will be dealt with by the youth offending team.”