A day after Bollywood megastar Salman Khan and his father, writer Salim Khan received death threats, a Mumbai Police team landed at their Bandra west home to carry out investigations and increased security there, on Monday.

Led by Joint Commissioner of Police Vishwas Nangre-Patil and other officers, the team queried the Khan family on a letter received near their flat in Galaxy Apartments on Sunday, threatening to do a 'Moosewala' with the celeb father-son duo.

"I will comment only after getting all the preliminary information in the case," said Nangre-Patil, even as extra security personnel were deployed at the Khans' residence.

Taking serious cognizance, the Bandra Police have lodged an FIR against unknown persons for issuing the death threats and launched their probe even as the Mumbai Police Crime Branch also started its own investigations.