Over the weekend, singer Justin Bieber was accused by two women of sexual assault. On Sunday, he took to Twitter to refute one of the allegations but has not commented on the other.

In a lengthy series of posts shared on Twitter this past Sunday, Bieber denied sexual assault claims made by a woman, known only as Daniel.

In a series of tweets, which were shared by the account PopCrave and have now been deleted, Danielle accused Bieber of assaulting her on March 9, 2014, after his performance at SXSW. She claims the singer took her to a Four Seasons Hotel in Austin, where he sexually assaulted her. In response to the tweets, Bieber said he’d been encouraged by his wife to speak up and claimed that “there is no truth to this story.” He also shared various receipts from AirBnbs and an article in an attempt to show that he had not been at the hotel mentioned in the claim.

“I don’t normally address things as I have dealt with random accusations my entire career[,] but after talking with my wife and team I have decided to speak up on an issue tonight. Rumors are rumors but sexual abuse is something I don’t take lightly. I wanted to speak out right away but out of respect to so many victims who deal with these issues daily, I wanted to make sure I gathered the facts before I made any statement,” Bieber wrote in his Twitter post. “In the past 24 hours, a new Twitter [account] appeared that told a story of myself involved with sexual abuse on March 9, 2014[,] in Austin[,] Texas[,] at the Four [S]easons [H]otel. I want to be clear. There is no truth to this story. In fact, as I will soon show I was never present at that location.”

In his claims, Bieber said that while he had performed at SXSW that year he attended the festival with his then-girlfriend Selena Gomez.

To back up his claims, Bieber shared photos of two of them together at the time. He also shared a series of email correspondences and receipts to show evidence of his Airbnb reservation. “I stayed with Selena and our friends at an Airbnb on the 9th and on the 10th stayed at a Westin because our hotel reservation at LÀ Quinta and not the four seasons was messed up. Here are the receipts for the hotel on the 10th,” Bieber wrote in his tweet.

Bieber also shared tweets from March 2014 that showed people had claimed to have seen him at the Four Seasons Hotel around the same time.

Bieber asserted that while he was at the restaurant he had not gone to the hotel. “Every claim of sexual abuse should be taken very seriously and this is why my response was needed,” Justin replied to the claims. “However this story is factually impossible and that is why I will be working with [T]witter and authorities to take legal action.”

In a separate claim, a woman identified only as Kadi also accused Bieber of sexual assault.

In response to Danielle’s claim, Kadi wrote “I believe Danielle, I am a victim of sexual assault by Justin Bieber too.” Kadi, whose tweets remain up, accused the singer of sexually assaulting her in New York City in 2015. Kadi claimed that after a brief encounter outside the Langham Hotel, where Justin was staying she was invited to his room around 2:30 a.m.

In her tweets, Kadi claimed Bieber’s bodyguard invited her up to his hotel to join a party where he took her to a separate area and assaulted her despite her asking him to stop. “I asked him to stop and continued to say that I cannot have sex whit[h] anyone prior to marriage (traditional and cultural thing) So Bieber started pushing me to the bed and have his body against mine, he pinned me down pulled my leggings down and his shorts and penetrated me (which is considered a very bad thing unless by the husband) it aggravated me and I pushed him and kicked him between his legs and run out to the living room,” she claimed