Desperate parents and friends used social media to search for loved ones on Tuesday after a blast killed at least 19 people at a British concert by US singer Ariana Grande, with images of happy-looking teenagers posted next to pleas for help. “Everyone pls share this, my little sister Emma was at the Ari concert tonight in #Manchester and she isn’t answering her phone, pls help me,” said one message posted alongside a picture of a blonde-haired girl with flowers in her hair. Another Twitter user called Erin:P urged people to help him find his sister: “She’s wearing a pink sweatshirt and blue jeans. Her name is Whitney.” please help me find my sister who was at the manchester thing tonight. she's wearing a pink sweatshirt and blue jeans. her name is whitney pic.twitter.com/y7Rz1i3RRJ — erin :p (@woahms) May 23, 2017 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> The blast rocked the foyer of the Manchester Arena as thousands of young fans and parents streamed out of the venue after the show by the U.S. singer, whose fan base is made up largely of teenagers and pre-teens. A third Twitter account, Deplorable MrsK, posted a picture of a young man smiling and wearing a suit, saying: “My son was in the Manchester Arena today. He’s not picking up my call! Please....” Montages of smiling faces were being circulated of teens still unaccounted for after the concert. Watch: video captures chaos at Manchester Arena Paula Robinson, 48, was at the train station next to the arena with her husband when she felt the explosion and saw dozens of teenage girls screaming and running away from the arena. “We ran out,” she said. “It was literally seconds after the explosion. I got the teens to run with me.” Robinson said shetook dozens of teenage girls to the nearby Holiday Inn Express hotel and tweeted out her phone number to worried parents telling them to meet her there. She said her phone had not stopped ringing since her tweet. “Parents were frantic running about trying to get to their children,” she said. “There were lots of children at Holiday Inn.” TO EVERYONE IN MANCHESTER IF YOU CANNOT FIND YOUR CHILD/FRIEND/SIBLING THE HOLIDAY INN HAS TAKEN IN MANY CHILDREN WHO WERE LOST AND AFFECTED pic.twitter.com/s9dDdtC3TM — avni (@mintybehz) May 23, 2017 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> Hours later, Holiday Inn and the Greater Manchester police wrote on their social media sites that there were no unaccompanied children at any of the hotels. The hotel, along with Premier Inn and other Manchester hotels in the area offered their door to any seeking shelter. Remember, follow @GMPolice for official updates pic.twitter.com/t1HuFL5zXW — G M Police (@gmpolice) May 23, 2017 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> Our hearts & prayers are with all of #Manchester this morning, following the devastating events of last night. ️ pic.twitter.com/XDKA5NTAVS — HI Manchester City (@HolidayInnMcr) May 23, 2017 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> In other messages, taxi drivers offered to ferry those who needed to leave the city for free, while the hashtag #RoomForManchester was being used to offer free bedrooms and sofas for anyone stuck in the city. “I’m 10 mins from Manchester city centre and can give lifts to or from anywhere. Anyone needs help, just let me know. #roomformanchester,” wrote a Twitter user called Danny Hutch.