Beyonce's dad says Beyonce and Jay Z's twins 'are here'
Beyonce's dad appears to have confirmed the singer has given birth to twins, posting a message of congratulations on social media.
Mathew Knowles tweeted a message saying "they're here" and wishing them a happy birthday from grandad.
US media had reported that Beyonce and Jay Z had welcomed two new babies but the pair have yet to announce the news or make a comment.
They already have a five-year-old daughter, Blue Ivy.
The singer confirmed her pregnancy earlier this year, sharing a photo of her baby bump on Instagram.
Speculation about the twins' birth had grown in recent days after a woman was photographed entering a Los Angeles hospital on Friday holding a card that read "B + J".
Although the gender of the babies has not yet been revealed, pink and blue balloons have been pictured in the media, suggesting Blue Ivy now has a brother and a sister.
Last month Beyonce shared a photo from the "Carter Push Party"
The African-themed event was an alternative to a baby shower and celebrated the upcoming arrival of the twins.