British BBC and dpa reported that a secondary school in the northern state of Katsina, Nigeria, was attacked by men with guns on the night of the 11th (local time).
Witnesses said the gangsters appeared in front of the school on motorcycles, firing guns into the air, and people around them fled.
Local officials say school security officers expelled some of the gangsters before police arrived at the scene.
This school is a science school established by the Nigerian government and the students are all known as boys.
According to China's Xinhua News Agency, Governor Aminu Masari Katshina said on the 13th that there were 839 students who have lived in the boarding school, and that 333 students are still seeking whereabouts.
Governor Masari explained that he was searching the woods or contacting parents to identify the actual number of abductees.
In addition, he ordered all secondary boarding schools in Katsina state to close.
Parents gathered at the school and urged the authorities to rescue their children.
Although the motives for kidnapping students are unknown, some observers say that it could be a ransom crime.
"I strongly condemn the attacks of cowardly bandits on innocent children," said President Bukuri, and said the military police are pursuing the bullies who raided the school.
In Nigeria, in April 2014, 276 female students were kidnapped by an Islamic extremist militant group Boko Haram in a school dormitory in Chibok in northeastern Borno.
Afterwards, after negotiations with the government, some girls were released or escaped, but about 100 are still missing.