It is not certain how many men are being detained.
Later a 23-year-old man was detained for talking about blowing up the school.
It seemed to me that the two men must have been detained in the woods.
Three other men have also been detained in connection with the investigation.
One man was killed and five more were detained in the raid, the military said.
However, the men who left were almost all temporarily detained.
About 100 men were detained, with six eventually being arrested.
According to them, up to 17 men had been detained by the police and "disappeared" between 21-24 March.
The man was detained after a court appearance on Wednesday.
The man believed to have won the free presidential elections in 1993 has been detained for two years.