The latest this afternoon from the Pima County Sheriff's Department now says that twenty people were shot yesterday in Tuscon, killing six and wounding fourteen, including U.S. Rep. Gabrielle Giffords. Among the dead are a Federal Judge and a nine-year old girl.

Six people were killed and 14 others wounded, including U.S. Rep. Gabrielle Giffords, when a gunman opened fire in front of a Safeway supermarket in Tucson, Arizona, authorities said. The congresswoman had been hosting a meeting with constituents Saturday morning when the attack began.

Here are the latest developments as confirmed by CNN:

U.S. Rep. Gabrielle Giffords is the only person wounded in Saturday's shooting who is still in critical condition, doctors at University Medical Center in Tucson said. Three are in serious condition, six are in fair condition, and one has been released, they said.

Officers of the Arizona Anti-Defamation League issued a statement condemning the attack: "During her years in the statehouse, Rep. Giffords served on the ADL Arizona Regional Board. Her affiliation with ADL, which monitors and exposes hate and extremist groups, contributed to her awareness of the nexus between hate ideology and violence. It is a testament to her dedication to her constituents that despite past threats against her, Rep. Giffords has always been so accessible to the people she represents. Our thoughts and prayers are with Congresswoman Giffords and the other victims and their families."

Investigators have identified and ruled out the "person of interest" they were seeking in connection with the shooting, a law enforcement official said Sunday.

Federal authorities have charged Jared Lee Loughner, the 22-year-old suspect in Saturday's Arizona massacre, with first-degree murder, attempted murder and attempting to kill a member of Congress, according to court documents. Read the charges here.

President Barack Obama called for a moment of silence to be held at 11 a.m. ET Monday and ordered flags to be flown at half-staff. "I call on Americans to observe a moment of silence to honor the innocent victims of the senseless tragedy in Tucson, Arizona, including those still fighting for their lives," the president said in a news release. "It will be a time for us to come together as a nation in prayer or reflection, keeping the victims and their families closely at heart."

Law enforcement investigators were speaking with a second person in the Arizona Safeway shootings case, a law enforcement official told CNN. It is not clear whether this individual is the same person police had sought via the release of a surveillance image from overnight. It is also unknown at this time what connection this individual may have to the investigation.

A dark-haired man seen in a picture distributed by authorities apparently "may not have been involved at all, but we still need to verify that," Pima County Sheriff Clarence Dupnik said Sunday.

Precautions are in place to ensure the security of public officials after the shooting of an Arizona congresswoman, although authorities are aware of no specific threat against them, FBI Director Robert Mueller told reporters Sunday.

The suspect in the Saturday shootings of 20 people at a Tucson, Arizona, grocery store is in federal custody, FBI Director Robert Mueller told reporters. Formal charges are expected against Jared Lee Loughner Sunday afternoon, he said.

U.S. Rep. Gabrielle Giffords of Arizona is "able to communicate" with people, and the gunshot wound she sustained Saturday did not cross from one hemisphere of the brain to the other, doctors at Tucson's University Medical Center said Sunday.

President Obama spoke by phone late Saturday to Mark Kelly, the husband of Rep. Gabrielle Giffords, who was critically injured in a mass shooting, a senior White House official said. The official told CNN that Obama "expressed his deep concern and full support" for the family in the wake of the tragedy.

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