A 26-year-old man who was arrested in connection with a hit and run incident has been released on bail pending further inquiries, West Yorkshire Police said.
Two other men remain in custody.
A 10-year-old girl who is fighting for her life following a hit-and-run incident has been described as "a little hero" by her family as police question three men about the collision.
Sabah Saleem and her two-year-old brother, Rayhan, were knocked down by a car in Brudenell Road, Hyde Park, Leeds, on Saturday.
Relatives have said Sabah was the most severely injured, probably because she was protecting her younger brother from the impact.
Three men are currently being questioned by police after being arrested in connection with the incident.
At the scene today, the children's aunt, Saima Rafiquee said: "Most likely what happened is that Sabah tried protecting her brother and she took the brunt of the accident.
"She's just a little hero, isn't she?
"It just shows you how a big sister would react with a younger brother."
Police investigating a hit and run incident in Leeds, which left a 10-year-old girl and her two-year-old brother in a critical condition have made two further arrests.
A 39-year-old man has been arrested on suspicion of dangerous driving. A 26-year-old man has been arrested on suspicion of assisting an offender.
The arrests follow the arrest of a 36-year-old Leeds man on Monday night on suspicion of dangerous driving and failing to stop and failing to report a collision. He remains in police custody. All three men are from the North West Leeds area.
– West Yorkshire police
At around 9.30pm police arrested a 36-year-old Leeds man in connection with the incident. He was arrested on suspicion of dangerous driving, failing to stop at the scene of an accident and failing to report an accident. Police have also recovered a vehicle in connection with the investigation.The 36-year-old remains in custody tonight for questioning by officers.
West Yorkshire police say they have arrested a 36-year-old man on suspicion of dangerous driving following a hit and run incident in Leeds which left a two-year-old boy and his 10-year-old sister in a critical condition.
A vehicle has also be recovered in connection with the incident.
The aunt of hit-and-run victims, 10-year-old Sabah and two-year-old Rayhan Saleem, has urged the driver of the car involved to come forward.
Speaking near the scene of the incident in Leeds, Azra Rafique said: "It's devastating. It's tragic for the family. It's absolutely shocking and I can't believe it's happened. I can't believe someone's actually done this and runaway."
She added: "We want to know who it is, please come forward. It's just not right doing this."
For the full interview visit ITV Calendar.
The cousin of the two children who remain in a critical but stable condition after a hit-and-run has said 10-year-old Sabah Saleem tried to protect her younger brother, Raham, at the incident in Leeds.
Shazad Azeem, who had just crossed the road ahead of his two cousins, said: "The car just came straight out and crashed into Sabah. Sabah tried to save Raham and she fell onto the bonnet (of the car) and Rayhan banged his head on the road."
He added: "She tried to protect Rayhan so he wouldn't get hurt more than herself. She just jumped in front of him.
"The driver didn't stop, he just went off."
For the full interview visit ITV Calendar.
A major investigation remains ongoing into what has been a catastrophic incident for Sabah and Rayhan's family on what should have been one of the happiest weekends of their year.
Specialist officers are working to support the family who are clearly extremely distressed, and for their sake we ask anyone who can help us more quickly find the driver responsible for this collision to come forwards now.
– Detective Superintendent Paul Taylor, West Yorkshire Police
We can now release a CCTV image of the car which we believe was responsible and ask that anyone who recognises this vehicle should contact us as a matter or urgency.
We also know there was a woman who was on the street at the time who we have not spoken to yet and would ask her to make contact with us as soon as possible."
West Yorkshire Police has released an image of woman walking down a street at the time of a hit and run incident in Leeds on Saturday which left two children in a critical condition.
Detectives believe she may have witnessed what took place and seen the Vauxhall Astra believed to be involved in detail.