The caller was identified as one-- Anuj Shrivastava, from Chakghat in Rewa district, who made at least six calls on Uma's cellphone during the last three days, police said today.
The caller threatened saying "I will kill her in two days," and dared Uma's security personnel to save her, police said.
He also used abusive language while speaking to Bharti's security staff who attended the calls.
Efforts were on to nab the culprit, they said.
