TUNIS (Reuters) - The secular party of Tunisian President Moncef Marzouki withdrew its three ministers from the Islamist-led government on Sunday, saying its demands for cabinet changes had not been met.

The decision by Marzouki's Congress for the Republic Party deals a further blow to Prime Minister Hamadi Jebali's government, already reeling from last week's assassination of secular opposition leader Chokri Belaid.

"We have been saying for a week that if the foreign and justice ministers were not changed, we would withdraw from the government," party official Ben Amor told Reuters.

(Reporting by Tarek Amara; Writing by Alistair Lyon; Editing by Alison Williams)