The Joint Action Committee of Non-teaching staff of the University of Ibadan on Monday began five-day warning strike.
The warning strike is to force government yield to their demands, which include the payment of a minimum of 30 billion Naira to defray earned allowances between 2012 and 2016.
As early as 7am, the Union leaderships put three entrance gates under lock and key denying people and vehicular access.
The central gate was however partially locked around 8am.
While vehicular movement was restricted, students trekked to receive lectures while administrative activities were paralysed.
According to Wale Akinremi, Chairman Senior Staff Association of Nigerian Universities (SSANU) the Unions are demanding the payment of a minimum of 30 billion Naira to defray earned allowances between 2012 and 2016.
The Unions also demanded reinstatement and payment of arrears of Staff School teachers in obedience to 2016 court judgement.