The Mumbai Police on Sunday lodged the First Information Report against an unknown person for sending a ‘Threatening letter’ to the Bollywood actor Salman Khan and his father Salim Khan. According to the police, Salim Khan found the letter on a bench where he sits daily after jogging in the morning. He found the letter at around 7.30 AM-8.00 AM in his and Salman’s name, said the police.