Students from Kenyatta University have on Monday staged demonstrations along Thika highway.
The students are demonstrating against what they term as mismanagement by the school administration.
Some have called the resignation of top Kenyatta University school administrators.
Police officers were called to calm the situation as some motorists complained about having their vehicles stoned.
Chaos erupted later on as teargas was lobbed into the air to disperse the students along the busy superhighway.
Motorists plying the road have been called upon to be on the lookout as they may have their vehicles destroyed.