Pakistan Christians Demand Help [Excerpts]
The warning has terrorised Christians in Charsadda.
Christians in northwest Pakistan are demanding government protection following threats of bomb attacks if they do not become Muslims.
An unsigned letter received 10 days ago said they had to convert by Thursday.
Militants have been carrying out a sustained campaign to prevent "anti-Islamic" activities in North West Frontier Province (NWFP).
Last week they blew up a number of music and video shops in the towns of Charsadda and Tangi.
The Christian community, a tiny minority, received an anonymous letter demanding they convert or face the consequences.
The government says it is giving protection.
The BBC's Barbara Plett in Islamabad says that while a few families have left, the rest live in fear.
Police say they have stepped up security at churches but Christians complain that not enough has been done to protect them.