This study will evaluate the safety and efficacy of intravenous ex vivo cultured adult allogenic mesenchymal stem cells in patients with ischemic cerebral stroke. Patient will be given single intravenous dose of allogenic mesenchymal stem cells 2 million cells/Kg body weight or placebo within 10 days of stroke. Patients will be followed up till 12 months. Safety will be evaluated by type, number and proportion of patients with adverse events. Efficacy will be evaluated by clinical parameters and MRI.