The Palestinian emergency government, led by Salam Fayyad, was sworn in on Sunday in the West Bank city of Ramallah, marking the collapse of the three-month-old Fatah-Hamas unity government.

The following are some major events that had happened since the Hamas-led government took office after defeating Fatah led by Palestinian President Mahmoud Abbas in parliamentary elections in 2006.

January 25, 2006 -- Hamas emerged winner of parliamentary elections after defeating the long-dominant Fatah.

March 28, 2006 -- The Hamas-led government was sworn in.

May 11, 2006 -- Leaders of various Palestinian factions jailed in Israeli prisons jointly signed the Document of National Accord, urging the settlement of inter-Palestinian frictions and effort to build an independent state in occupied land.

June 25, 2006 -- Palestinian militants captured an Israeli solider, and Israel responded by sending troops into Gaza. The military action lasted five months.

June 27, 2006 -- Major Palestinian factions reached consensus on the Document of National Accord.

August 16, 2006 -- Abbas said Palestinian Prime Minister Ismail Haneya agreed to talk with Fatah and other factions on forming a national unity government.

October 1, 2006 -- Fierce clashes erupted between Hamas militants and Fatah supporters in Gaza, killing eight people and wounding over 70.

December 1, 2006 -- Abbas announced talks on forming a unity government collapsed.

December 16, 2006 -- Abbas said he had decided to push for a plan to hold early presidential and legislative elections in the Palestinian territories.

February 8, 2007 -- Abbas and Hamas politburo chief Khaled Mashaal signed the Mecca Agreement, which urged the two sides to end violence, form a national unity government and put the Palestine Liberation Organization (PLO) back in order.

February 15, 2007 -- The Palestinian government was dissolved, and Abbas authorized Haneya to build a new government.

March 17, 2007 -- The Fatah-Hamas unity government was sworn in.

May 23, 2007 -- Abbas and Haneya met to discuss how to stop the escalation of violence between Fatah and Hamas.

June 9, 2007 -- Militants from Hamas and Fatah clashed heavily in the Gaza Strip, causing as many as 30 casualties.

June 14, 2007 -- Hamas took control of Gaza from Fatah, which prompted Abbas to dismantle the unity government and announce a state of emergency in the West Bank and Gaza Strip.

June 15, 2007 -- Abbas named Fayyad prime minister of an emergency government.

(Xinhua News Agency June 18, 2007)