India's Foreign Ministry has vowed to investigate an attack against Nigerian students by a crowd in the capital, New Delhi. At least five Nigerian students were injured in Monday's incident. Affected students have been sharing their ordeal. The crowd was angry at the death of a local teenager from an apparent drug overdose. Crowds turned on Nigerian and other African students after the teen's family blamed them for giving him the narcotics. Several attacks have been reported against African nationals in New Delhi. Last year, a Congolese student was stoned to death.