CNN: Osama bin Laden is dead

Updated, 11:20 p.m. ET A crowd that has gathered outside the White House is singing the national anthem, within an hour after reports that al Qaeda leader Osama bin Laden has been killed.

The group also chanted, “USA! USA!” and “Hey, hey, goodbye!” in reference to  bin Laden.

A senior U.S. official says bin Laden was killed by U.S. forces in a mansion outside the Pakistani capital of Islamabad along with other family members.

U.S. President Barack Obama is expected to address the nation shortly.

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Updated, 11:15 p.m. ET Al Qaeda leader Osama bin Laden was killed by U.S. forces in a mansion outside the Pakistani capital of Islamabad along with other family members, a senior U.S. official tells CNN.

Congressional and administration sources say U.S. officials have the body of bin Laden. Further details around his death were not immediately available.

Bin Laden was the leader of al Qaeda, the terrorist network behind the September 11, 2001, attacks on the United States.

U.S. President Barack Obama is expected to address the nation shortly.

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Updated, 10:55 p.m. ET A woman whose mother was killed on American Airlines Flight 11 on September 11 expressed “relief” over reports that Osama bin Laden is dead.

In an e-mail to CNN, Carrie Lemack said:  “Cannot express how this feels to my family, but relief is one word.  We hope we can now focus on all that that madman took, namely nearly 3,000 + innocent victims, and not on him.”

Updated, 10:55 p.m. ET Osama bin Laden is dead, sources told CNN Sunday night.

Congressional and administration sources say U.S. officials have the body of bin Laden, who was reportedly killed in Afghanistan. The details about his death were not immediately available.

U.S. President Barack Obama is expected to address the nation shortly.

Updated, 10:45 p.m. ET  Osama bin Laden is dead, CNN’s John King reported Sunday night, citing sources.

Initial post, 10:09 p.m. ET U.S. President Barack Obama is expected to make a statement Sunday night, tentatively at 10:30 p.m., the White House said. The subject of his address was not known.

Obama is expected to address national security in his speech, a source said.