People in the western Venezuelan city of San Cristobal say National Guard troops have attacked and dismantled barricades that protesters had raised at key intersections.

Local TV journalist Beatriz Font and other witnesses say guardsmen fired a lot of tear gas, including at nearby residential buildings. They say the attack began before midnight and continued into early Monday.

Roger Federer, Rafael Nadal, Andy Murray and Stanislas Wawrinka won their opening matches Saturday in the BNP Paribas Open.

Federer, the four-time champion seeded seventh, beat French qualifier Pail-Henri Mathieu. The Swiss star was coming off his 78th career title last week in Dubai.

Chelsea scored four goals in the second half to thrash 10-man Tottenham 4-0 and provisionally move seven points clear in the Premier League on Saturday.

Jose Mourinho's side was unconvincing before halftime but Samuel Eto'o sparked a stunning revival by taking advantage of Jan Vertonghen's slip and ill-judged back pass to nip in and score in the 56th minute.

Visa and MasterCard are forming a group that's intended to help the retail and banking industries come together on more-secure credit card payments.

Credit card breaches at Neiman Marcus, Target and other retailers have put a spotlight on the weak spots in the security of credit card payments.

Astronomer Carl Sagan become Mr. Science for a generation after his 1980 series, "Cosmos," took audiences on a groundbreaking TV journey through the universe.

Astrophysicist Neil deGrasse Tyson, host of "Cosmos: A Spacetime Odyssey," the 21st-century edition debuting Sunday, has a head start with a Twitter following of 1.7 million that's just edged by the starry likes of Gwyneth Paltrow and Cee Lo Green.

Egypt has announced that a team of European archaeologists have found a nearly 2-meter- (6 ½-foot-) tall alabaster statue of a pharoanic princess, dating from approximately 1350 B.C., outside the southern city of Luxor.

Minister of Antiquities Mohammed Ibrahim said in in a statement Friday that the statue was once part of a larger statue that was nearly 14 meters (456 feet) tall and guarded the entrance to a temple.

Ke$ha is out of rehab for an eating disorder.

The singer's representative confirmed Friday that Ke$ha had checked out of the facility. She had entered treatment in January.

Isaac Mizrahi will tell the whole story.

The fashion celebrity has a deal with Amy Einhorn Books for a memoir that will track his rise from an unhappy childhood in Brooklyn to hanging out at Studio 54 to international fame.

The "holy grail of guitars" is among the hundreds of rare and vintage acoustic guitars going on the auction block in New York next month.

California collector Hank Risan is offering some of his musical instruments for auction by Guernsey's on April 2 and April 3. The 265 pieces from his collection are considered among the finest of vintage guitars to come to auction in terms of rarity, original construction and condition, the auction house says.

Actor Vince Vaughn is bringing a new comedy festival to Nashville this spring with live tapings and stand-up acts to be held at the city's music venues.

Vaughn's Wild West Comedy Festival on May 15-18 will include comedians Aziz Ansari, Rodney Carrington and Dennis Miller among others.