Thousands of Hungarians gathered outside the country's parliament in Budapest Saturday in protest at changes to the new constitution they say infringe on civil rights.

After a demonstration on Thursday, protestors and a number of NGOs including Amnesty International launched a second rally against a package of measures due to be adopted Monday.

The so-called 'fourth amendment' includes forcing students who receive state grants to stay and work in Hungary after their studies, and a limitation to the powers of the constitutional court.

Opponents claim the changes will accelerate an assault on democratic structures started by the Fidesz-led government in 2010, and have also drawn criticism from the European Commission.

[Image via Agence France-Presse]