Police investigations are continuing into the bus collision in Stanley.
Officers are in the process of interviewing a number of witnesses to establish the exact circumstances of the crash.
Both bus drivers remain in hospital, as does the 12-year-old boy. His condition is stable.
A number of other children, who have more minor injuries, also remain in hospital.
"The investigation into the collision yesterday is very much underway. My officers are currently in the process of interviewing key witnesses and I would ask anyone who was on either of the buses to contact us if they have not already spoken to a police officer."
The bus driver taken to hospital after a bus crash in Stanley has thanked the emergency services.
Paul Stephenson, 54, of Annfield Plain, County Durham, was driving the Go North East double deck bus that was involved in the collision and was trapped for more than two hours.
"I'm really grateful to the firefighters, police and paramedics who came to me assistance - they did a great job in difficult circumstances.
"And I'd like to thank everyone for their best wishes and support."
"I'd like to thank the emergency services and passers-by who came to the aid of the drivers and passengers yesterday. My thoughts are with all those who were injured yesterday and I send them my best wishes for a speedy recovery."
A Facebook support page has been set up for the 12-year-old boy who was airlifted to hospital after the Stanley bus crash. Well wishes have left messages of support for him.
"Stay strong and make a full recovery, you can do this! My thoughts are with you and your family! Just stay strong."
"Don't know you or your family but just thought I would wish you and everyone else involved in the crash yesterday a speedy recovery! Get well soon x"
"Think it's absolutely great how this brave young man is getting so much support off so many different people. Get well soon young'n! X"
The man thought to be the driver of one of the buses involved in the Stanley crash has thanked supporters from his hospital bed. Paul Stephenson, who was named locally, left this message on Facebook:
"To all my FB friends I'm in the RVI with a big gash in my head and right knee. Being kept in overnight as a precaution thank god I'm still here thought I was a gonna. Thanks to my wonderful wife and daughter for all there wonderful support I love you"
Parents, witness and those involved have been leaving messages on the Facebook page of one of the school's involved in the Stanley crash.
The bus driver deserves more than a gold medal, he saw the [bus] come and told us all to get back."
"Safety has to be paramount and I know my kids stand on the buses all the time coz there's no seats! Not on!! And dangerous!!!"
"Frightening experience for all involved. [The] concern was to get to his A Level exam at 9. Wishing all those injured a speedy recovery."
Difficult and potentially lengthy investigations have begun to established why two school buses crashed in County Durham, injuring 28 children and two adult divers.
This reports is from Joshua Shrimpton Dean:
28 schoolchildren and two drivers were taken to hospital today after two school buses collided head-on at Stanley, County Durham.
This evening one boy, aged 12, and one man, are being treated for serious injuries.
Watch Dan Ashby's full reports here:
Two sisters were among the young people involved in the crash. Charlotte Lowery and Kayleigh Ward held hands as they lay on stretchers, waiting to go to hospital.
Both teenagers were allowed home after treatment, but the crash meant Charlotte missed a crucial GCSE exam.
They spoke to Helen Ford:
"We can now confirm all of the roads around the area of the bus crash are now open. Stay safe.
Police investigating this morning’s collision involving two buses in the Stanley area of County Durham are appealing for the driver of a small, dark-red hatchback car to get in touch with them.
It is believed the vehicle stopped at the scene of the collision, which occurred at about 8.20 this morning, and then drove on.
Durham Police say there is no suggestion that this vehicle was in anyway involved in the collision.
It is believed the person or people travelling in the car may have seen something that could help police enquiries.
They are being urged to to contact Durham Police via the non-emergency number 101 and ask to speak to the collision investigators.