Thousands of Islamists demonstrated in central Amman to call for reforms on Friday, just hours after King Abdullah II dissolved parliament and called early polls without any major political change.

"We demand constitutional reform before the people revolt. The people want to reform the regime," they chanted in the demonstration held outside Al-Husseini mosque in downtown Amman.

AFP correspondents estimated the crowd to number 15,000.

"Democratic electoral law, constitutional changes, parliamentary governments, independent judiciary, constitutional court, effective anti-corruption efforts and preventing security services from interfering in political life," read a large banner carried by protesters spelling out their demands.