Ruling on the congregational prayer for one obligated to perform a security duty

Question:
A security guard works at a girls' school, and the midday prayer time arrives while he is in the middle of his work. Should he pray at his place of work, or should he go to the mosque, even though he is unable to?

Answer:
The security guard should pray in his place if he is not permitted to go. He should pray in his place. A guard at a gate, or at a prison, or over money, or over something else; he is excused. He should pray in his place, like a sick person.