"Fight those who believe not in Allah nor the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the Jizya with willing submission, and feel themselves subdued." -- Qur'an 9:29
Authorities in Pakistan have held three people over a threat to bomb a church school in Islamabad unless it paid them $51,000 (£38,000), officials say.
A letter sent to the school, apparently by a little-known militant group, demanded cash for not bombing it.
It accused the church school of offering prayers for Pakistani schoolgirl Malala Yousafzai, who was injured by a Taliban gunmen in October.
Correspondents say this is being taken seriously by Pakistani intelligence .
The letter was received by the school in November and intelligence officials are still investigating.
It warned the church administration that they would be "responsible for the consequences" if they reported the cash demand to the authorities.
The three arrests were made in Khyber Pakhtunkhwa province, police say.
The BBC's Shahzad Malik in Islamabad says that the letter was sent by a previously unknown group called the Khyber Pakhtunkhwa Suicide Attackers Group....