Charges filed against the Tuscon gunman

Prosecutors on Sunday filed a federal complaint against Jared Lee Loughner, charging him with the attempted assassination of U.S. Congresswoman Gabrielle Giffords on Saturday.

The shooting happened at about 10.11 a.m. MST at a supermarket in northwest Tucson on Saturday where Giffords was hosting her first "Congress on Your Corner" of the year. Loughner, 22, opened fire, killing six people and injuring 13 others.

President Obama calls for moment of silence for victims of Arizona mass shooting

U.S. President Barack Obama on Sunday called on Americans to observe a moment of silence on Monday to honor the victims of a mass shooting in Arizona on Saturday, the White House said.

The shooting happened just after 10 a.m. MST at a supermarket in northwest Tucson on Saturday where Giffords was hosting her first "Congress on Your Corner" of the year. A gunman, identified as 22-year-old Jared Loughner, opened fire, killing six people and injuring 14 others.

U.S. Congresswoman Giffords critically injured in Arizona mass shooting

U.S. Congresswoman Gabrielle Giffords was seriously injured on Saturday when a gunman opened fire at a public event in Tucson, Arizona, officials said. Several others were killed and injured.

The shooting happened just after 10 a.m. MST at a supermarket in northwest Tucson where Giffords was hosting her first "Congress on Your Corner" of the year. "My 1st Congress on Your Corner starts now," Giffords tweeted just before the shooting. "Please stop by to let me know what is on your mind or tweet me later."

According to local officials, a 21-year-old gunman walked up to Giffords and shot her in the head, seriously injuring her. The gunman, who was later arrested, also shot numerous other people.