Gunmen from Islamist group Boko Haram on Tuesday night shot or burned to death 59 boys in a boarding school in north-east Nigeria.
India has issued a travel warning to its nationals in Nigeria urging them to be cautious while visiting the oil-rich nation's troubled northeastern region, where a state of emergency had been declared last month.
Rediff.com presents a list of most gruesome terror attacks on schools through the years.
In a televised broadcast on December 31,2011, Nigerian President Goodluck Jonathan declared a state of emergency in parts of the country following anti-Christian violence by a jihadi group called Boko Haram.