Los Angeles, Jun 21 (IANS): Popular Hollywood couple Beyonce Knowles and Jay Z's twins were born premature and are being treated for jaundice.

The twins have been in the hospital since their birth a week ago with a "minor issue", according to sources connected with the family.

"The babies are under the lights," added the source, refereeing to 'bili lights', designed to lower bilirubin in the blood to eliminate the jaundice.

Meanwhile, television host Jimmy Kimmel pranked his audience on the show "Jimmy Kimmel Live!" -- aired in India on Star World and Star World HD -- claiming that he has first photograph of the twins.

He said: "We managed to get an exclusive first photo of the babies, of the children. I won't tell you how and I should make you wait until the end of the show to see this, but I can't wait anymore myself. Here they are, the world's most anticipated twins."

But the photographs turned out to be of US President Donald Trump's sons Eric and Donald Jr.