CPI leader D Raja has expressed serious concerns regarding the recent murder of NCP leader Baba Siddique, questioning the "silence" of Union Home Minister Amit Shah on the matter on Monday, reported news agency ANI.

"Murder of Baba Siddique is a matter of concern. What is happening in Mumbai is sad. How can someone sitting in jail claim this...Why is Union Home Minister Amit Shah silent on this, why is he not speaking anything about the crimes being committed in Maharashtra," the CPI leader told ANI.