Mitrofan Petrovich Belyayev ( old style 10 22 February 1836, St. Petersburg22 December 1903 4 January 1904) was an Imperial Russian music publisher, outstanding philanthropist, and the owner of a large wood dealership enterprise in Russia.

The investigations carried out by the Lebanese security forces have focused predominantly on determining the actual ownership of the truck by attempting to trace its ownership history through vehicle licensing records, border controls and manufacturing or dealership records.