Ariana Grande returns to US,tour uncertain

Ariana Grande has returned to the US one day after a suicide bomber killed 22 people at the singer's concert in Manchester as questions linger over whether she will continue her European tour.

Grande, 23, is seen in photographs posted on the Daily Mail website walking down the steps of a private plane at an airport in her hometown of Boca Raton, Florida, and being met by family members.

The images show the diminutive pop star appearing downcast as she greeted her boyfriend, the rapper Mac Miller, on the tarmac and getting into a waiting car.

Grande had not been seen publicly since an explosion ripped through the packed Manchester Arena at the end of her performance there.

Some of the 22 people who died in the attack were teens or young girls.

Grande was apparently unharmed.

In her only statement so far, Grande took to Twitter about five hours after the bombing to describe herself as "broken" in the aftermath of the attack.

"from the bottom of my heart, i am so so sorry. i don't have words," she said in the tweet.

Grande was performing in Manchester during the European leg of a tour to promote her third album, Dangerous Woman, which also has her scheduled to visit London, Belgium, Poland, Germany, Switzerland and France.

Despite speculation she would cancel the rest of the tour, no formal announcement had been made as of Tuesday.

Grande's manager, Scooter Braun, did not respond to requests for comment by Reuters.