A number of SSA teachers gathered at the exhibition ground and tried to take out a rally in support of their demands.
However, they were stopped by police and baton-charged after they refused to disperse, officials said.
Meanwhile, opposition National Conference condemned the the use of force on SSA teachers and sought a probe into the "brutal act" of police to silence peaceful protesters.
"Action against teachers, the pillars of the society, is highly deplorable," National Conference Provincial spokesperson Madan Mantoo said in a statement.
Mantoo demanded immediate release of the salaries of SSA teachers so that "they are not forced to take to the streets".