Up to 40 feared dead in party blaze

Firefighters say two-story warehouse was a 'death trap' with no sprinklers or smoke detectors

Fire crews in California worked into the night on Saturday sifting through the remains of a warehouse gutted by a blaze during a rave party, with officials saying they fear the death toll could reach 40.

Relatives of dozens of people missing in the Friday night blaze in Oakland near San Francisco continued their anxious wait for news. Nine people are confirmed dead so far.