Colombian unions, student groups and other protesters were marching on Thursday to insist the government maintain the minimum wage for young people and the universal right to a pension, even though the government says those are not part of reform plans.

As tens of thousands of marchers converged on Bogota¡¯s central square and other meeting points, blockades closed some mass transit stations. In the northwestern neighborhood of Suba, police fired tear gas in an attempt to reopen a station, while some protesters blockaded roads with dumpsters.

Seven police officers were injured in the city of Cali, where several buses were vandalized, the police reported.