Traffic was disrupted at two places on Kamarajar Salai and near the Secretariat when a large number of sanitation workers tried to stage a protest against the outsourcing of conservancy operations. Police personnel detained 424 workers on Friday.

A senior official of the City police said the sanitation workers have been organising protests against the outsourcing of sanitation services in the Royapuram and Thiru. Vi. Ka. Nagar zones of the city Corporation for more than 100 days.

On Friday, over 100 sanitation workers went on a protest in front of the memorial of former Chief Minister M. Karunanidhi in Marina Beach.

When the protesters attempted to block the road, the security personnel posted on Kamarajar Salai detained them in two buses.

Another group of sanitation workers assembled near the Secretariat and tried to block the road, raising slogans against the outsourcing and demanding the workers to be made permanent. A large posse of policemen immediately rounded up the protesting workers and detained them. Mild tension prevailed during their detention as the workers resisted from being detained.