Christian defendants facing trial over an alleged lynching were reportedly promised acquittal by a public official if they converted to Islam.
The 42 men were charged with killing two Muslims after the suicide bombing of two churches in Youhanabad, Lahore.
At least 15 people died in the 2015 attack, one of a number carried out by the Taliban on Pakistan’s minority Christian community.
“Public Prosecutor Syed Anees Shah gathered the accused outside the courtroom and asked them to embrace Islam,” legal activist Joseph Franci told the Express Tribune.
“He told them if they embraced Islam, he can guarantee them their acquittal in this case.”
Mr Franci told the newspaper the accused did not answer and were surprised by the comment. But Mr Shah reportedly made the same offer six months ago.
After an initial denial, Mr Shah admitted to the Tribune he offered the defendants the chance to convert.
Highly conservative Islam is widespread in Pakistan and Christians, who make up around 1.6 per cent of the population, make up one of the most maligned sections of society.
There have been numerous instances in recent years of Christians being targeted in bombings and also by mobs accusing them of blasphemy.
Pakistanis of no religion have also been victims of state blasphemy laws. Earlier in March, authorities charged three bloggers, including a man who used the pseudonym Allama Ayaz Nizami, who headed the Athiest and Agnostic Alliance Pakistan.
The group’s website and Facebook page now appear to have been taken down.
Soon after the arrests, the hash tag #HangAyazNizami became one of the most trending in the country, as people called for his execution.
Blasphemy is punishable by death in Pakistan.
Senior judges have called for restrictions on social media in order to stop the circulation of so-called blasphemous material.
But critics have said blasphemy laws are being used to silence people opposed to hard line conservatives.
