Watch: British news anchor breaks down in tears reporting on Manchester terror attack

Television presenter Susanna Reid broke down on Tuesday's airing of "Good Morning Britain" while speaking with the mother of 15-year-old Olivia Campbell, who has been missing since Monday night's terrorist bombing at Manchester Arena.

Speaking with the young girl's mother — Charlotte Campbell — Reid lost her composure as Campbell began weeping openly while on the phone with Reid and co-host Piers Morgan.

"I cannot image the agony that ..." Reid began before taking a moment to regroup. "I cannot imagine what parents are going through this morning."

Reid began to cry and the show's producers had to cut away and feature a photo of Olivia instead while Reid composed herself.

"It doesn't help anybody if I get upset," Reid can be heard saying quietly off-camera. "You don't have to be a parent to imagine what people must be going through this morning."

Charlotte Campbell reached out to "Good Morning Britain" in a plea to spread the news that her daughter is missing. Campbell noted that Olivia attended the concert with her best friend, who she discovered was in the hospital with undetermined injuries.

"I don't want to say too much because I don't know how much his parents want me to say," Campbell told Morgan. "He is very poorly but he's safe."

Unfortunately, Campbell has not been briefed by hospitals, police or investigators as to specifics of her daughter's whereabouts. She was advised by law enforcement officials to remain at home in case Olivia returns as others search the areas for any sign of her daughter.

Nearly 21,000 Ariana Grande fans were in Manchester Arena on Monday night for a stop on Grande’s “Dangerous Woman” world tour when a home-made bomb was detonated after the show concluded.

After the concert ended, lights in the arena were turned back on and concertgoers began exiting the venue. At that time, suicide bomber Salman Abedi detonated his homemade explosive, killing at least 22 people and injuring scores more. The suicide bomber also died at the arena.

On Tuesday, ISIS took responsibility for the terror attack, saying, "One of the soldiers of the caliphate placed explosive devices in a gathering of crusaders in the middle of the British city of Manchester."

See Reid and Campbell's exchange in the video below.