amman (ap) | Suicide bombings at hotels in the Jordanian capital that are popular with Israelis and Americans killed at least 57 people and wounded more than 300 on Wednesday, Nov. 9.

Jordanian authorities said the attacks bore the signature of al-Qaida.

The explosions hit the Grand Hyatt, Radisson SAS and Days Inn hotels in the evening. The Radisson is popular with American and Israeli tourists and was a target of several foiled al-Qaida plots, including a conspiracy to attack U.S. and Israeli tourists during the kingdom’s millennium celebrations

Israel’s ambassador to Jordan, Yaakov Hadas, told Israel TV from Amman there were no reports of Israeli casualties.

A State Department official said there was no information on any American casualties. The White House said the United States was prepared to offer help in the investigation.

Amman has become a base for Westerners who fly in and out of Iraq for work. The city’s main luxury hotels downtown are often full of American and British officials and contractors enjoying the relative quiet of the city.

“Obviously this is something Jordan is not used to,” Jordan’s deputy prime minister Marwan Muasher told CNN. “We have been lucky so far in avoiding those incidents.” He said most of the casualties appeared to be Jordanians.

“Finally, the terrorists succeeded in breaking the security in Jordan,” Ayman al-Safadi, editor of Jordan’s al-Ghad newspaper, told al-Arabiya satellite network.