"We're told a "minor issue" surfaced, and as a result. doctors do not feel comfortable releasing them".
Meanwhile a source close to the family told People: "Bey and Jay are thrilled and have started sharing the news with their family and closest friends". Showbiz 411 first reported on Saturday that multiple sources confirmed the power couple welcomed two children on Monday night or Tuesday morning.
In February the Formation singer broke the internet with her pregnancy announcement after posting a photograph of her sizeable baby bump on social media.
Appropriately, the babies were born under Gemini, the Zodiac sign symbolised by twins.
"We have been blessed two times over".
It was also noted that during a video message recorded for Jay Z's induction into the Songwriters Hall of Fame this week, former president Barack Obama may have revealed the gender of the twins. "Jay and I are also fools for our daughters. Although he's going to have me beat when those twins show up", leading fans to speculate the babies were both girls. Increasing the rumours further, Beyoncé's sister Solange Knowles had been spotted at the Los Angeles medical centre rumoured to be where the couple is having the children, according to reports on Thursday.
"Taking to Twitter one fan said: "#Beyonce, sweetie. Yes, as you know, Beyonce has given birth and it's official.
Richard Wilkins pressed The Voice Australia coach on whether she could comment on any "happy news" but Kelly gave nothing away.
"In New York for my friend's son's wedding!" she captioned an Instagram selfie.
This one said: "The twins have arrived!"
This story originally appeared in The Sun and has been republished here with permission.