HPCC president Sukhwinder Singh Sukhu today said a letter has been received but refused to divulge the name of the signatories and the exact contents of the letter.
According to Sukhu, the MLAs have warned that the mishandling of the case can have adverse impact on the party's fate in the upcoming assembly polls, which is slated to be held later this year.
It was alleged that the minor girl had gone to school on July 5, but did not return home. Her body was found in the morning of July 6 from a nearby forest.
On a complaint lodged by her father with Kotkhai police station, an FIR was registered against unknown persons.
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The local police then arrested six suspects.
One of them died under mysterious circumstances while in police custody.
The gangrape-and-murder has triggered angry protests by the locals and various political parties in the state.