Pakistani police have arrested a number of suspects after a 14-year-old girl was shot in the head by the Taliban for promoting education for girls.
Malala Yousufzai was attacked along with two classmates while they were on their way home from school in the Swat Valley on Tuesday.
She is being kept unconscious on a ventilator at the country's top military hospital in Rawalpindi.
The Taliban claimed responsibility for the shooting, saying Malala was promoting "Western thinking".
A spokesman for one of the group's branches in the country's north said it decided to kill Yousufzai two months ago in a planned attack after her family ignored repeated warnings.
Police have been questioning people in the town of Mingora, near where the shooting took place.
Mingora police chief Afzal Khan Afridi said arrests had been made, but did not give any other details.
Interior Minister Rehman Malik told reporters on Friday that the two gunmen who staged the attack were not among those arrested
The Taliban spokesman said the girl's family had been warned three times - the most recent coming last week.
Major General Asim Saleem Bajwa told reporters Malala's condition was satisfactory, but he added: "The next 36 to 48 hours are critical."
Mr Bajwa said two foreign doctors were being consulted but that for the moment no decision had been made on sending her abroad for further treatment.
He said the bullet entered Malala's head and went down her neck toward her spine, but it was too soon to say if she had a significant injury.
Malala won international prominence after highlighting Taliban atrocities in the Swat Valley through a BBC blog three years ago.
At the time Islamist militants burned girls' schools and terrorised the valley before the army intervened.
The shooting has sparked international outrage. There has been an outpouring of praise for her bravery from leaders at home and abroad with Pakistani authorities offering a reward of more than \$100,000 (£62,257) for the capture of her attackers.
Malala was shot after the school bus she was travelling on was flagged down by Taliban gunmen.
One man stepped on the bus and asked the children to identify Malala after which three shots were fired.
One bullet hit her in the head while the second hit the shoulder of her school friend and the third caused a minor injury to another girl.
A Taliban spokesman said the group carried out the attack after repeatedly warning Malala to stop speaking against them.
The school she attended in Mingora, owned and operated by her father, reopened on Friday but many students stayed away despite a police presence.
One of the teachers, Zafar Ali Khan, said: "We have decided to open the school after two days to overcome the fear among our students that gripped them due to the attack."
Ayesha Khan, a ninth-grade student said: "Many of the students haven't come due to fear, but I believe this fear will subside ultimately."