Police describe California shooting discoveries
American police say the two attackers who shot dead 14 people at a centre for people with disabilities in California fired 75 rifle rounds.
They also left behind a pipe bomb that failed to go off.
The husband and wife opened fire on a pre-Christmas party in San Barnardino.
They were later shot dead by police. Local police chief Jarrod Burguan says officers then searched their home.
"There were 12 pipe bomb type devices found in the garage of that house. There were also hundreds of tools, many of which could be used to construct improvised explosive devices or pipe bombs," he said.
(File photo)