Shoppers lured by money-saving deals filled US stores on Friday, but the annual kick-off to holiday shopping appeared weaker this year as worries about a deep recession kept purchases down.

The day after the US Thanksgiving Day marks the traditional start of the holiday shopping season, when retailers can make up to 40 percent of their annual sales. Crowds gathered outside stores for predawn deals.

The frenzied bargain-hunting took a somber turn when a worker at Wal-Mart in Valley Stream, New York, died after shoppers broke down doors to enter the store at 5am EST (1000 GMT). Four others were hurt in what Wal-Mart called a 'tragic' incident.

Shoppers at Toys 'R' Us in Palm Desert, California, ran for cover when two men shot and killed each other in the store, the town's mayor said. Toys 'R' Us said the dispute appeared to be personal, and no other injuries were reported.

This holiday weekend will test the strength of consumer sentiment, a main driver of the U.S. economy, as the country faces its worst financial crisis since the Great Depression.

To generate excitement during what some experts predict may be the bleakest holiday season in nearly two decades, retailers from Wal-Mart to Macy's Inc and Best Buy opened early on 'Black Friday'.

Marjorie Daube, 59, of Manhattan scaled back her shopping and was only buying sale items, aware that her husband's bonus at a financial firm would decline this year.

'Shopping was never fun at all, and it's less fun now,' Daube said.

Natalie Diaz, 32, planned to cut by half the $2,000 she shelled out last year for Christmas gifts, but said she would not scrimp on presents for her twins.

'Santa does not have a recession,' she said, shopping at a JC Penney store in Jersey City, New Jersey.

Michele Greaves, browsing in a Brooklyn mall, said she would buy her children only one present each this year.

'I'm penny-pinching, and I ask myself, 'Do you really need that?' My kids are small. I have to save,' Greaves said.

Fewer bags

Early store traffic was lighter this year, but picked up by midday, said Marshal Cohen, chief retail analyst at NPD Group.

'The traffic is up compared to last year, but the bag count is down,' he said. 'There may be more casual shoppers, but they're not buying as much as last year.'

Britt Beemer of America's Research Group said he saw shoppers carrying 25 to 40 percent fewer bags this year.

'If the item was there, they bought it. If it wasn't there, they left,' said Beemer, calling this year's customer a 'hit-and-run shopper.'

A weak view of holiday sales was evident on Wall Street on Friday. The Standard & Poor's Retail Index slipped 1.6 percent on Friday and is down 36 percent so far this year, versus a 39 percent drop for the S&P 500 index.

Consumer electronics, toys and clothing were the goods in highest demand, from flat-screen televisions to cashmere sweaters, according to the National Retail Federation.

At a New Jersey Best Buy, it took 1-1/2 hours for a crowd of nearly 1,000 people to enter at 5 a.m., a manager said.

Cars were parked on the lawn and sidewalk outside a Circuit City store in Burlington, Massachusetts, after the bankrupt retailer announced six-hour specials.

Best Buy President Brian Dunn told Reuters he was pleased with customer response to its offers.

'It's almost cathartic to see people out there buying again and focusing not so much on the fear and the drudgery of the tough news that we're all dealing with,' Dunn said.

Parking lots at Taubman Centers Inc malls in New Jersey, Virginia, Michigan and Connecticut were nearly 100 percent full by the afternoon, a spokeswoman said.

Still, holiday traffic<