At least 57 people have been killed and 115 injured in explosions at hotels in the Jordanian capital, Amman.
Three hotels, the Radisson SAS, the Grand Hyatt and the Days End, were targeted.
Jordan's deputy prime minister, Marwan Moasher, said two of the blasts appeared to have been caused by bombers with 'suicide belts' and a third by a suicide car bomb. Many of the victims are believed to be Jordanians.
It is understood the blast at the Radisson Hotel ripped through a banqueting room where about 250 people were attending a wedding reception. The hotel is known to be popular with Western and Israeli tourists.
Witnesses said scores of people were injured in the explosion at the nearby Hyatt hotel. The blast at the nine-storey building appeared to have struck the lobby.
While the Days Inn, which is located near the Israeli embassy in west Amman, was also targeted by a suicide bomber.
Jordan's King Abdullah II has said the deadly attacks were 'terrorist acts' and pledged that 'justice will pursue the criminals'.
The White House condemned the bombings as 'a heinous act of terror' against innocent civilians and US President George W Bush also offered assistance in the investigation.
Meanwhile, the Minister for Foreign Affairs, Dermot Ahern, has expressed his shock at news.
Jordan had previously been spared major attacks on foreigners despite its proximity to Iraq and popularity as a tourist destination.