Auckland bus drivers unhappy with the lack of toilet breaks are striking today and more than 100 have signed a petition asking for better working conditions.

The strike will cause disruptions to Metrolink, North Star, Go West, Waka Pacific, City Link and Outer Link bus services in Auckland between 9am and 2.30pm.

Bus drivers claim their employer, NZ Bus, has been increasing working hours without providing toilet breaks.

They will be stopping work to attend a meeting at Mt Eden War Memorial Hall.