Boo the Pomeranian dog dies 'from a broken heart'
Social media star Boo the Pomeranian dog has died at the age of 12.
His owners say he had shown signs of heart problems ever since his "best friend" - a dog called Buddy - died in 2017.
"We think his heart literally broke when Buddy left us," they wrote on his official Facebook page.
Boo had 16 million followers on Facebook, made TV appearances, and even released a book called Boo - the life of the world's cutest dog.
End of Facebook post by Boo
Boo and his friend Buddy had lived together for 11 years - before Buddy passed away in September 2017 at the age of 14.
His owners, who are from the US, say Boo passed away in his sleep early Saturday morning and they were "heartbroken".
They added: "But we find comfort knowing that he is no longer in any pain or discomfort.
"We know that Buddy was the first to greet him on the other side of that rainbow bridge, and this is likely the most excited either of them have been in a long time."