Interior Minister Chaudhry Nisar Ali Khan said the army will remain deployed in Jhelum town, 250 kilometres from Lahore, till the law and order situation improves.
He also asked the Punjab government to beef up security of Ahmadi places of worship across the province.
Taking strict note of the arson incident Khan directed police to hold a "transparent" investigation.
"Nobody can be allowed to take the law into his hand," Khan said.
Also Read
Police have arrestedthe accused Qamar Ahmed Tahir, also an Ahmadi, on charges of committing blasphemy.
Pakistan's Ahmadis consider themselves Muslim but were declared non-Muslims by the Constitution and are also barred from proselytising or identifying themselves as Muslims. Some 1.5 million Ahmadis live across the country.
"An attempt was made to burn Ahmadis alive after accusing them of defiling the holy Quran," alleged Salimuddin, a spokesperson for the Ahmadi community. He said the factory had long been functioning in Jhelum.
"Someone pushed the vicious allegation of blasphemy for personal vendetta and animosity," he said, demanding a transparent investigation of the incident and swift action to bring the perpetrators to justice.
Rights groups say Pakistan's controversial blasphemy law has often led to violence and persecution of religious minorities. It is frequently misused to make unfounded accusations to settle personal scores and disputes.