Investar Bank said Monday that shareholders of Hammond-based First Community Holding Co. approved Investar’s acquisition of First Community Bank and that it has received all required regulatory approvals.

The merger is expected to be completed Wednesday.

The merger will increase Baton Rouge-based Investar’s Northshore New Orleans and southeast Louisiana presence.

Investar will have nine branches with the merger: two each in Baton Rouge and Mandeville and one each in Hammond, Denham Springs, Port Allen, Prairieville and Metairie. A 10th location is expected to open later this year in Lafayette.

Investar said an operational conversion will take place at First Community June 20-23. Until then, First Community customers will see no changes and their banking services should continue normally through the process, Investar said. Customers also can use either Investar or First Community branches.