Man (22) arrested on suspicion of murdering nine-year-old Lillia Valutyte in England

Lincolnshire Police said officers detained the 22-year-old suspect in the Boston Central Park area at about 2.45pm this afternoon.

He is now in custody with police adding that they are “not looking for anyone else in connection with this incident”.

They added that progress on the investigation into Lillia's death was made through a "combination of intelligence and information supplied by several members of the public".

Earlier, the force had released four CCTV images of a man they sought to identify, and several members of the public came forward with information.

The images were taken in the Wormgate and Fountain Lane area at around 6.15pm on Thursday, police said.

Lillia, who was fatally stabbed, was found on Fountain Lane at about 6.20pm on Thursday.

She had reportedly been playing with her younger sister on the street just yards from an office where their mother was working at the time.

The girls had a hula hoop, and a toy pram was left at the scene, according to local residents.

In a statement issued at 4pm today, Chief Superintendent Martyn Parker thanked members of the public who had aided the inquiry, and urged anyone else with information to contact police.

He said: "We are still encouraging anyone with information to contact us. Once again, I would like to personally thank you for the support you have shown from members of the public and from the media".

The CCTV photos released earlier showed a man in the Wormgate and Fountain Lane area of Boston at 6.15pm on Thursday - five minutes before Lillia was found dead.

The force had warned anyone who had seen him not to approach him but to dial 999 immediately.

Lincolnshire Police also said that two people who were arrested earlier this week have now been released with no further action.

They added that a person caught on video being led out of an address by officers on Friday is not a suspect, nor are they under investigation, after footage circulated online.

Lillia was found on Fountain Lane in Boston at about 6.20pm on Thursday.

She had reportedly been playing with her younger sister on the street just yards from an office where their mother was working at the time.

The girls had a hula-hoop, and a toy pram was left at the scene, according to local people.

A resident from the area told the Telegraph: "The little girl was playing in the street with her younger sister when it happened. They had some toys out.

"I'm sure her mum wouldn't have been far away as she always checked on them. She was a very quiet girl, and I just can't understand it.

"I didn't see what happened, but we were told they (police) were looking for footage of a man running away."

Jurate Matulioniene, a family friend and chairwoman of the Boston Lithuanian Community, told The Times: "Lillia was a beautiful angel, she was quite quiet and loved dancing.

"The family used to come to all of our community events and they would always stay late to help clear up.

"I have spoken to the mum and asked for her account details because we want to do a fundraiser but she would not accept it."