Polytechnic students on Sunday threatened to go on a tough movement, including boycotting the board final examination scheduled to be held on September 29, unless their two-point demand is met immediately.
In a statement, Bangladesh Karigari Chhatra Parishad (BKCP), an organisation of the polytechnic students, issued the threat from their scheduled demonstration and road blockade programmes observed across the country on Sunday.
The demands include re-fixation of the definition of engineers and removal of the discriminatory salary to diploma engineers.
Earlier in the day, students of polytechnic institutes across the country staged demonstrations and blocked roads from 11am to 1pm to press home their demands as part of the programmes announced earlier.
Expressing solidarity with them, polytechnic teachers and diploma engineers also joined the agitation.
In some places, the agitators got locked in clashes with the law enforcers.
In Comilla, at least 10 people were injured in a clash between police and students of Comilla Polytechnic Institute at noon.
Witnesses said the clash ensued when police tried to prevent the students from blocking Dhaka-Chittagong highway.
Later, the law enforcers charged baton on the students and fired 18 bullets which left 10 people injured.
In Dinajpur, three students of Dinajpur Polytechnic Institute were injured as they clashed with cops on Dhaka-Dinajpur Highway.
Later, police fired blank shots to bring the situation under control.
In Kushtia, the students of Kushtia Polytechnic Institute blocked Kushtia-Jhenidah highway at Majampur Railgate disrupting vehicular movement on the busy road for half an hour.
In Thakurgaon, diploma engineers blocked road, burned tyres on roads and took out a protest procession.
In Tangail, police dispersed agitating students of Tangail Polytechnic Institute when the latter tried to block road near Bangabandhu Bridge.