Transcript for The latest on the terror attack in Manchester

We want to start with Amy in Manchester with new details about the attack and suspect. Good morning, Amy. Reporter: That's right, good morning, George and everyone. Prime minister Theresa may warning another attack could be imminent. At least 5,000 British troops are expected to be out and about to touring public gatherings here as new information comes to light about that suicide bomber, Salman Abedi. The interior minister saying he is believed to have traveled to Syria and has proven links to the islamic state. The uk's terror level at its highest as they search for possible accomplices of the now identified killer. He's looking at whether the terrorist was acting alone or as part of a group. Reporter: Identifying the suspected bomber as 22-year-old British born Salman Abedi seen here on the cover of "The sun" newspaper. Police swarming his residence blowing open the door searching for evidence. Among the items removed a book entitled "Know your chemicals." This morning we are learning more about what happened after those moments after Ariana grande left the stage. What's going on? I can't find moi mom. Reporter: Authorizes believe the killer detonated his bomb here connecting Manchester repellent and the nearby train station. I spoke with Lizzie Murtagh who took her daughter to the concert as a Christmas present. It was going to be the best night of my life. Oh, my god. Reporter: As they left the show the bomb exploded in the foyer. It was the biggest bang, biggest explosion I've ever heard like a big white flash. Reporter: Shrapnel ripped through their clothes and bodies. My leg, the hole where the shrapnel it. I felt it hit because I was still sore. A few seconds before and we wouldn't have been here. It was so close. Reporter: Now, yesterday we showed a photo of a young girl believed to be missing after the attack and later learned the person who posted her picture was not a relative and she was not at that concert. She is home safe and fine. We regret any error or confusion that may have caused but unfortunately so many other people not so fortunate and the -- among the 22 victims now so many people paying their respects at this memorial and several memorials throughout the city in Manchester growing by the moment, George. Yeah, the Steve osunsami is really coming together. Thanks very much.

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